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Finding the Fourth Proportional to 28,757, 39,686.28 and 16,182.56

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Solution

The fourth proportional to 28,757, 39,686.28 and 16,182.56 is: 22,332.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757 : 39,686.28 = 16,182.56 : x
  2. Step 2: Convert to fraction form
    28,757/39,686.28 = 16,182.56/x
  3. Step 3: Cross multiply
    28,757x = 39,686.28 × 16,182.56
  4. Step 4: Simplify right side
    28,757x = 642,225,607.28
  5. Step 5: Solve for x
    x = 642,225,607.28/28,757
  6. Step 6: Final answer
    x = 22,332.84

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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.