Home / 28,475.26-42,688.58-20,129.02

Finding the Fourth Proportional to 28,475.26, 42,688.58 and 20,129.02

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Solution

The fourth proportional to 28,475.26, 42,688.58 and 20,129.02 is: 30,176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.26 : 42,688.58 = 20,129.02 : x
  2. Step 2: Convert to fraction form
    28,475.26/42,688.58 = 20,129.02/x
  3. Step 3: Cross multiply
    28,475.26x = 42,688.58 × 20,129.02
  4. Step 4: Simplify right side
    28,475.26x = 859,279,280.59
  5. Step 5: Solve for x
    x = 859,279,280.59/28,475.26
  6. Step 6: Final answer
    x = 30,176.35

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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.