Home / 13,394.20-18,478.98-7,724.92

Finding the Fourth Proportional to 13,394.20, 18,478.98 and 7,724.92

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Solution

The fourth proportional to 13,394.20, 18,478.98 and 7,724.92 is: 10,657.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,394.20 : 18,478.98 = 7,724.92 : x
  2. Step 2: Convert to fraction form
    13,394.20/18,478.98 = 7,724.92/x
  3. Step 3: Cross multiply
    13,394.20x = 18,478.98 × 7,724.92
  4. Step 4: Simplify right side
    13,394.20x = 142,748,642.18
  5. Step 5: Solve for x
    x = 142,748,642.18/13,394.20
  6. Step 6: Final answer
    x = 10,657.50

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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.