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Finding the Fourth Proportional to 21,387.49, 32,085.05 and 7,343.89

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Solution

The fourth proportional to 21,387.49, 32,085.05 and 7,343.89 is: 11,017.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.49 : 32,085.05 = 7,343.89 : x
  2. Step 2: Convert to fraction form
    21,387.49/32,085.05 = 7,343.89/x
  3. Step 3: Cross multiply
    21,387.49x = 32,085.05 × 7,343.89
  4. Step 4: Simplify right side
    21,387.49x = 235,628,960.91
  5. Step 5: Solve for x
    x = 235,628,960.91/21,387.49
  6. Step 6: Final answer
    x = 11,017.14

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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.