Home / 15,497.69-21,385.06-8,781.88

Finding the Fourth Proportional to 15,497.69, 21,385.06 and 8,781.88

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Solution

The fourth proportional to 15,497.69, 21,385.06 and 8,781.88 is: 12,118.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,497.69 : 21,385.06 = 8,781.88 : x
  2. Step 2: Convert to fraction form
    15,497.69/21,385.06 = 8,781.88/x
  3. Step 3: Cross multiply
    15,497.69x = 21,385.06 × 8,781.88
  4. Step 4: Simplify right side
    15,497.69x = 187,801,030.71
  5. Step 5: Solve for x
    x = 187,801,030.71/15,497.69
  6. Step 6: Final answer
    x = 12,118.00

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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.