Home / 13,210.63-18,231.28-7,242.75

Finding the Fourth Proportional to 13,210.63, 18,231.28 and 7,242.75

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Solution

The fourth proportional to 13,210.63, 18,231.28 and 7,242.75 is: 9,995.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,210.63 : 18,231.28 = 7,242.75 : x
  2. Step 2: Convert to fraction form
    13,210.63/18,231.28 = 7,242.75/x
  3. Step 3: Cross multiply
    13,210.63x = 18,231.28 × 7,242.75
  4. Step 4: Simplify right side
    13,210.63x = 132,044,585.11
  5. Step 5: Solve for x
    x = 132,044,585.11/13,210.63
  6. Step 6: Final answer
    x = 9,995.33

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Half scale
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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.