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Finding the Fourth Proportional to 28,594.90, 42,892.36 and 7,818.40

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Solution

The fourth proportional to 28,594.90, 42,892.36 and 7,818.40 is: 11,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,594.90 : 42,892.36 = 7,818.40 : x
  2. Step 2: Convert to fraction form
    28,594.90/42,892.36 = 7,818.40/x
  3. Step 3: Cross multiply
    28,594.90x = 42,892.36 × 7,818.40
  4. Step 4: Simplify right side
    28,594.90x = 335,349,562.85
  5. Step 5: Solve for x
    x = 335,349,562.85/28,594.90
  6. Step 6: Final answer
    x = 11,727.60

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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.