Home / 15,129.46-20,875.66-9,161.68

Finding the Fourth Proportional to 15,129.46, 20,875.66 and 9,161.68

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Solution

The fourth proportional to 15,129.46, 20,875.66 and 9,161.68 is: 12,641.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.46 : 20,875.66 = 9,161.68 : x
  2. Step 2: Convert to fraction form
    15,129.46/20,875.66 = 9,161.68/x
  3. Step 3: Cross multiply
    15,129.46x = 20,875.66 × 9,161.68
  4. Step 4: Simplify right side
    15,129.46x = 191,256,116.71
  5. Step 5: Solve for x
    x = 191,256,116.71/15,129.46
  6. Step 6: Final answer
    x = 12,641.30

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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.