Home / 13,389.76-18,475.20-7,724.16

Finding the Fourth Proportional to 13,389.76, 18,475.20 and 7,724.16

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Solution

The fourth proportional to 13,389.76, 18,475.20 and 7,724.16 is: 10,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.76 : 18,475.20 = 7,724.16 : x
  2. Step 2: Convert to fraction form
    13,389.76/18,475.20 = 7,724.16/x
  3. Step 3: Cross multiply
    13,389.76x = 18,475.20 × 7,724.16
  4. Step 4: Simplify right side
    13,389.76x = 142,705,400.83
  5. Step 5: Solve for x
    x = 142,705,400.83/13,389.76
  6. Step 6: Final answer
    x = 10,657.80

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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.