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Finding the Fourth Proportional to 21,959.60, 32,931.30 and 10,862.60

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Solution

The fourth proportional to 21,959.60, 32,931.30 and 10,862.60 is: 16,289.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.60 : 32,931.30 = 10,862.60 : x
  2. Step 2: Convert to fraction form
    21,959.60/32,931.30 = 10,862.60/x
  3. Step 3: Cross multiply
    21,959.60x = 32,931.30 × 10,862.60
  4. Step 4: Simplify right side
    21,959.60x = 357,719,539.38
  5. Step 5: Solve for x
    x = 357,719,539.38/21,959.60
  6. Step 6: Final answer
    x = 16,289.89

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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.