Home / 15,391.59-21,240.39-8,318.01

Finding the Fourth Proportional to 15,391.59, 21,240.39 and 8,318.01

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Solution

The fourth proportional to 15,391.59, 21,240.39 and 8,318.01 is: 11,478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.59 : 21,240.39 = 8,318.01 : x
  2. Step 2: Convert to fraction form
    15,391.59/21,240.39 = 8,318.01/x
  3. Step 3: Cross multiply
    15,391.59x = 21,240.39 × 8,318.01
  4. Step 4: Simplify right side
    15,391.59x = 176,677,776.42
  5. Step 5: Solve for x
    x = 176,677,776.42/15,391.59
  6. Step 6: Final answer
    x = 11,478.85

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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.