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Finding the Fourth Proportional to 21,666.91, 32,490.63 and 9,973.75

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Solution

The fourth proportional to 21,666.91, 32,490.63 and 9,973.75 is: 14,956.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.91 : 32,490.63 = 9,973.75 : x
  2. Step 2: Convert to fraction form
    21,666.91/32,490.63 = 9,973.75/x
  3. Step 3: Cross multiply
    21,666.91x = 32,490.63 × 9,973.75
  4. Step 4: Simplify right side
    21,666.91x = 324,053,420.96
  5. Step 5: Solve for x
    x = 324,053,420.96/21,666.91
  6. Step 6: Final answer
    x = 14,956.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.