Home / 28,149.26-42,223.95-8,430.75

Finding the Fourth Proportional to 28,149.26, 42,223.95 and 8,430.75

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Solution

The fourth proportional to 28,149.26, 42,223.95 and 8,430.75 is: 12,646.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149.26 : 42,223.95 = 8,430.75 : x
  2. Step 2: Convert to fraction form
    28,149.26/42,223.95 = 8,430.75/x
  3. Step 3: Cross multiply
    28,149.26x = 42,223.95 × 8,430.75
  4. Step 4: Simplify right side
    28,149.26x = 355,979,566.46
  5. Step 5: Solve for x
    x = 355,979,566.46/28,149.26
  6. Step 6: Final answer
    x = 12,646.15

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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.