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Finding the Fourth Proportional to 28,656.90, 42,948.90 and 13,833.90

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Solution

The fourth proportional to 28,656.90, 42,948.90 and 13,833.90 is: 20,733.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,656.90 : 42,948.90 = 13,833.90 : x
  2. Step 2: Convert to fraction form
    28,656.90/42,948.90 = 13,833.90/x
  3. Step 3: Cross multiply
    28,656.90x = 42,948.90 × 13,833.90
  4. Step 4: Simplify right side
    28,656.90x = 594,150,787.71
  5. Step 5: Solve for x
    x = 594,150,787.71/28,656.90
  6. Step 6: Final answer
    x = 20,733.25

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1.5x scale

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.