Home / 12,543.20-18,762.96-11,402.72

Finding the Fourth Proportional to 12,543.20, 18,762.96 and 11,402.72

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Solution

The fourth proportional to 12,543.20, 18,762.96 and 11,402.72 is: 17,056.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.20 : 18,762.96 = 11,402.72 : x
  2. Step 2: Convert to fraction form
    12,543.20/18,762.96 = 11,402.72/x
  3. Step 3: Cross multiply
    12,543.20x = 18,762.96 × 11,402.72
  4. Step 4: Simplify right side
    12,543.20x = 213,948,779.25
  5. Step 5: Solve for x
    x = 213,948,779.25/12,543.20
  6. Step 6: Final answer
    x = 17,056.95

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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.