Home / 28,309.92-39,030.96-18,220.32

Finding the Fourth Proportional to 28,309.92, 39,030.96 and 18,220.32

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Solution

The fourth proportional to 28,309.92, 39,030.96 and 18,220.32 is: 25,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.92 : 39,030.96 = 18,220.32 : x
  2. Step 2: Convert to fraction form
    28,309.92/39,030.96 = 18,220.32/x
  3. Step 3: Cross multiply
    28,309.92x = 39,030.96 × 18,220.32
  4. Step 4: Simplify right side
    28,309.92x = 711,156,581.11
  5. Step 5: Solve for x
    x = 711,156,581.11/28,309.92
  6. Step 6: Final answer
    x = 25,120.40

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.