Home / 21,325.68-31,988.22-9,630.72

Finding the Fourth Proportional to 21,325.68, 31,988.22 and 9,630.72

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Solution

The fourth proportional to 21,325.68, 31,988.22 and 9,630.72 is: 14,445.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.68 : 31,988.22 = 9,630.72 : x
  2. Step 2: Convert to fraction form
    21,325.68/31,988.22 = 9,630.72/x
  3. Step 3: Cross multiply
    21,325.68x = 31,988.22 × 9,630.72
  4. Step 4: Simplify right side
    21,325.68x = 308,069,590.12
  5. Step 5: Solve for x
    x = 308,069,590.12/21,325.68
  6. Step 6: Final answer
    x = 14,445.94

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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.