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Finding the Fourth Proportional to 21,951.60, 32,927.40 and 20,858.10

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Solution

The fourth proportional to 21,951.60, 32,927.40 and 20,858.10 is: 31,287.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.60 : 32,927.40 = 20,858.10 : x
  2. Step 2: Convert to fraction form
    21,951.60/32,927.40 = 20,858.10/x
  3. Step 3: Cross multiply
    21,951.60x = 32,927.40 × 20,858.10
  4. Step 4: Simplify right side
    21,951.60x = 686,803,001.94
  5. Step 5: Solve for x
    x = 686,803,001.94/21,951.60
  6. Step 6: Final answer
    x = 31,287.15

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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.