Home / 20,328.76-30,502.80-7,187.32

Finding the Fourth Proportional to 20,328.76, 30,502.80 and 7,187.32

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Solution

The fourth proportional to 20,328.76, 30,502.80 and 7,187.32 is: 10,784.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.76 : 30,502.80 = 7,187.32 : x
  2. Step 2: Convert to fraction form
    20,328.76/30,502.80 = 7,187.32/x
  3. Step 3: Cross multiply
    20,328.76x = 30,502.80 × 7,187.32
  4. Step 4: Simplify right side
    20,328.76x = 219,233,384.50
  5. Step 5: Solve for x
    x = 219,233,384.50/20,328.76
  6. Step 6: Final answer
    x = 10,784.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.