Home / 15,515.92-21,411.56-9,143.11

Finding the Fourth Proportional to 15,515.92, 21,411.56 and 9,143.11

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Solution

The fourth proportional to 15,515.92, 21,411.56 and 9,143.11 is: 12,617.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.92 : 21,411.56 = 9,143.11 : x
  2. Step 2: Convert to fraction form
    15,515.92/21,411.56 = 9,143.11/x
  3. Step 3: Cross multiply
    15,515.92x = 21,411.56 × 9,143.11
  4. Step 4: Simplify right side
    15,515.92x = 195,768,095.58
  5. Step 5: Solve for x
    x = 195,768,095.58/15,515.92
  6. Step 6: Final answer
    x = 12,617.24

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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.