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Finding the Fourth Proportional to 28,711.76, 42,811.06 and 28,655.60

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Solution

The fourth proportional to 28,711.76, 42,811.06 and 28,655.60 is: 42,727.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,711.76 : 42,811.06 = 28,655.60 : x
  2. Step 2: Convert to fraction form
    28,711.76/42,811.06 = 28,655.60/x
  3. Step 3: Cross multiply
    28,711.76x = 42,811.06 × 28,655.60
  4. Step 4: Simplify right side
    28,711.76x = 1,226,776,610.94
  5. Step 5: Solve for x
    x = 1,226,776,610.94/28,711.76
  6. Step 6: Final answer
    x = 42,727.32

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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.