Home / 15,318.68-21,139.22-9,360.32

Finding the Fourth Proportional to 15,318.68, 21,139.22 and 9,360.32

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Solution

The fourth proportional to 15,318.68, 21,139.22 and 9,360.32 is: 12,916.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.68 : 21,139.22 = 9,360.32 : x
  2. Step 2: Convert to fraction form
    15,318.68/21,139.22 = 9,360.32/x
  3. Step 3: Cross multiply
    15,318.68x = 21,139.22 × 9,360.32
  4. Step 4: Simplify right side
    15,318.68x = 197,869,863.75
  5. Step 5: Solve for x
    x = 197,869,863.75/15,318.68
  6. Step 6: Final answer
    x = 12,916.90

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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.