Home / 30,432.36-42,025.40-28,775.71

Finding the Fourth Proportional to 30,432.36, 42,025.40 and 28,775.71

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Solution

The fourth proportional to 30,432.36, 42,025.40 and 28,775.71 is: 39,737.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,432.36 : 42,025.40 = 28,775.71 : x
  2. Step 2: Convert to fraction form
    30,432.36/42,025.40 = 28,775.71/x
  3. Step 3: Cross multiply
    30,432.36x = 42,025.40 × 28,775.71
  4. Step 4: Simplify right side
    30,432.36x = 1,209,310,723.03
  5. Step 5: Solve for x
    x = 1,209,310,723.03/30,432.36
  6. Step 6: Final answer
    x = 39,737.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.