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Finding the Fourth Proportional to 28,925.80, 43,340.10 and 14,102.80

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Solution

The fourth proportional to 28,925.80, 43,340.10 and 14,102.80 is: 21,130.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,925.80 : 43,340.10 = 14,102.80 : x
  2. Step 2: Convert to fraction form
    28,925.80/43,340.10 = 14,102.80/x
  3. Step 3: Cross multiply
    28,925.80x = 43,340.10 × 14,102.80
  4. Step 4: Simplify right side
    28,925.80x = 611,216,762.28
  5. Step 5: Solve for x
    x = 611,216,762.28/28,925.80
  6. Step 6: Final answer
    x = 21,130.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.