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Finding the Fourth Proportional to 28,862.64, 39,830.64 and 16,926.20

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Solution

The fourth proportional to 28,862.64, 39,830.64 and 16,926.20 is: 23,358.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,862.64 : 39,830.64 = 16,926.20 : x
  2. Step 2: Convert to fraction form
    28,862.64/39,830.64 = 16,926.20/x
  3. Step 3: Cross multiply
    28,862.64x = 39,830.64 × 16,926.20
  4. Step 4: Simplify right side
    28,862.64x = 674,181,378.77
  5. Step 5: Solve for x
    x = 674,181,378.77/28,862.64
  6. Step 6: Final answer
    x = 23,358.27

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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.