Home / 20,987.30-31,527.16-12,672.27

Finding the Fourth Proportional to 20,987.30, 31,527.16 and 12,672.27

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Solution

The fourth proportional to 20,987.30, 31,527.16 and 12,672.27 is: 19,036.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.30 : 31,527.16 = 12,672.27 : x
  2. Step 2: Convert to fraction form
    20,987.30/31,527.16 = 12,672.27/x
  3. Step 3: Cross multiply
    20,987.30x = 31,527.16 × 12,672.27
  4. Step 4: Simplify right side
    20,987.30x = 399,520,652.17
  5. Step 5: Solve for x
    x = 399,520,652.17/20,987.30
  6. Step 6: Final answer
    x = 19,036.30

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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.