Home / 21,325.60-31,988.10-9,638.80

Finding the Fourth Proportional to 21,325.60, 31,988.10 and 9,638.80

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Solution

The fourth proportional to 21,325.60, 31,988.10 and 9,638.80 is: 14,458.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.60 : 31,988.10 = 9,638.80 : x
  2. Step 2: Convert to fraction form
    21,325.60/31,988.10 = 9,638.80/x
  3. Step 3: Cross multiply
    21,325.60x = 31,988.10 × 9,638.80
  4. Step 4: Simplify right side
    21,325.60x = 308,326,898.28
  5. Step 5: Solve for x
    x = 308,326,898.28/21,325.60
  6. Step 6: Final answer
    x = 14,458.06

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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.