Home / 15,417.28-21,262.56-12,432

Finding the Fourth Proportional to 15,417.28, 21,262.56 and 12,432

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Solution

The fourth proportional to 15,417.28, 21,262.56 and 12,432 is: 17,145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,417.28 : 21,262.56 = 12,432 : x
  2. Step 2: Convert to fraction form
    15,417.28/21,262.56 = 12,432/x
  3. Step 3: Cross multiply
    15,417.28x = 21,262.56 × 12,432
  4. Step 4: Simplify right side
    15,417.28x = 264,336,145.92
  5. Step 5: Solve for x
    x = 264,336,145.92/15,417.28
  6. Step 6: Final answer
    x = 17,145.45

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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.