Home / 15,617.28-21,484.80-13,815.36

Finding the Fourth Proportional to 15,617.28, 21,484.80 and 13,815.36

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Solution

The fourth proportional to 15,617.28, 21,484.80 and 13,815.36 is: 19,005.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,617.28 : 21,484.80 = 13,815.36 : x
  2. Step 2: Convert to fraction form
    15,617.28/21,484.80 = 13,815.36/x
  3. Step 3: Cross multiply
    15,617.28x = 21,484.80 × 13,815.36
  4. Step 4: Simplify right side
    15,617.28x = 296,820,246.53
  5. Step 5: Solve for x
    x = 296,820,246.53/15,617.28
  6. Step 6: Final answer
    x = 19,005.89

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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.