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Finding the Fourth Proportional to 21,702.79, 32,554.09 and 9,220.90

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Solution

The fourth proportional to 21,702.79, 32,554.09 and 9,220.90 is: 13,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.79 : 32,554.09 = 9,220.90 : x
  2. Step 2: Convert to fraction form
    21,702.79/32,554.09 = 9,220.90/x
  3. Step 3: Cross multiply
    21,702.79x = 32,554.09 × 9,220.90
  4. Step 4: Simplify right side
    21,702.79x = 300,178,008.48
  5. Step 5: Solve for x
    x = 300,178,008.48/21,702.79
  6. Step 6: Final answer
    x = 13,831.31

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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.