Home / 18,938.10-28,407.15-5,790.47

Finding the Fourth Proportional to 18,938.10, 28,407.15 and 5,790.47

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Solution

The fourth proportional to 18,938.10, 28,407.15 and 5,790.47 is: 8,685.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.10 : 28,407.15 = 5,790.47 : x
  2. Step 2: Convert to fraction form
    18,938.10/28,407.15 = 5,790.47/x
  3. Step 3: Cross multiply
    18,938.10x = 28,407.15 × 5,790.47
  4. Step 4: Simplify right side
    18,938.10x = 164,490,720.91
  5. Step 5: Solve for x
    x = 164,490,720.91/18,938.10
  6. Step 6: Final answer
    x = 8,685.70

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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.