Home / 15,369.12-21,209.13-8,654.70

Finding the Fourth Proportional to 15,369.12, 21,209.13 and 8,654.70

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Solution

The fourth proportional to 15,369.12, 21,209.13 and 8,654.70 is: 11,943.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.12 : 21,209.13 = 8,654.70 : x
  2. Step 2: Convert to fraction form
    15,369.12/21,209.13 = 8,654.70/x
  3. Step 3: Cross multiply
    15,369.12x = 21,209.13 × 8,654.70
  4. Step 4: Simplify right side
    15,369.12x = 183,558,657.41
  5. Step 5: Solve for x
    x = 183,558,657.41/15,369.12
  6. Step 6: Final answer
    x = 11,943.34

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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.