Home / 15,376.80-21,221.98-8,663.72

Finding the Fourth Proportional to 15,376.80, 21,221.98 and 8,663.72

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Solution

The fourth proportional to 15,376.80, 21,221.98 and 8,663.72 is: 11,957.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.80 : 21,221.98 = 8,663.72 : x
  2. Step 2: Convert to fraction form
    15,376.80/21,221.98 = 8,663.72/x
  3. Step 3: Cross multiply
    15,376.80x = 21,221.98 × 8,663.72
  4. Step 4: Simplify right side
    15,376.80x = 183,861,292.57
  5. Step 5: Solve for x
    x = 183,861,292.57/15,376.80
  6. Step 6: Final answer
    x = 11,957.06

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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.