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Finding the Fourth Proportional to 21,603.59, 32,412.06 and 9,129.18

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Solution

The fourth proportional to 21,603.59, 32,412.06 and 9,129.18 is: 13,696.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.59 : 32,412.06 = 9,129.18 : x
  2. Step 2: Convert to fraction form
    21,603.59/32,412.06 = 9,129.18/x
  3. Step 3: Cross multiply
    21,603.59x = 32,412.06 × 9,129.18
  4. Step 4: Simplify right side
    21,603.59x = 295,895,529.91
  5. Step 5: Solve for x
    x = 295,895,529.91/21,603.59
  6. Step 6: Final answer
    x = 13,696.59

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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.