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Finding the Fourth Proportional to 15,501, 21,392.10 and 8,695.68

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Solution

The fourth proportional to 15,501, 21,392.10 and 8,695.68 is: 12,000.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501 : 21,392.10 = 8,695.68 : x
  2. Step 2: Convert to fraction form
    15,501/21,392.10 = 8,695.68/x
  3. Step 3: Cross multiply
    15,501x = 21,392.10 × 8,695.68
  4. Step 4: Simplify right side
    15,501x = 186,018,856.13
  5. Step 5: Solve for x
    x = 186,018,856.13/15,501
  6. Step 6: Final answer
    x = 12,000.44

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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.