Home / 28,712.76-42,812.55-28,656.60

Finding the Fourth Proportional to 28,712.76, 42,812.55 and 28,656.60

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Solution

The fourth proportional to 28,712.76, 42,812.55 and 28,656.60 is: 42,728.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.76 : 42,812.55 = 28,656.60 : x
  2. Step 2: Convert to fraction form
    28,712.76/42,812.55 = 28,656.60/x
  3. Step 3: Cross multiply
    28,712.76x = 42,812.55 × 28,656.60
  4. Step 4: Simplify right side
    28,712.76x = 1,226,862,120.33
  5. Step 5: Solve for x
    x = 1,226,862,120.33/28,712.76
  6. Step 6: Final answer
    x = 42,728.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.