Home / 12,543.60-18,818.10-3,779.40

Finding the Fourth Proportional to 12,543.60, 18,818.10 and 3,779.40

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Solution

The fourth proportional to 12,543.60, 18,818.10 and 3,779.40 is: 5,669.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.60 : 18,818.10 = 3,779.40 : x
  2. Step 2: Convert to fraction form
    12,543.60/18,818.10 = 3,779.40/x
  3. Step 3: Cross multiply
    12,543.60x = 18,818.10 × 3,779.40
  4. Step 4: Simplify right side
    12,543.60x = 71,121,127.14
  5. Step 5: Solve for x
    x = 71,121,127.14/12,543.60
  6. Step 6: Final answer
    x = 5,669.91

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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.