Home / 18,365.10-25,344.12-9,981.78

Finding the Fourth Proportional to 18,365.10, 25,344.12 and 9,981.78

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Solution

The fourth proportional to 18,365.10, 25,344.12 and 9,981.78 is: 13,775.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,365.10 : 25,344.12 = 9,981.78 : x
  2. Step 2: Convert to fraction form
    18,365.10/25,344.12 = 9,981.78/x
  3. Step 3: Cross multiply
    18,365.10x = 25,344.12 × 9,981.78
  4. Step 4: Simplify right side
    18,365.10x = 252,979,430.13
  5. Step 5: Solve for x
    x = 252,979,430.13/18,365.10
  6. Step 6: Final answer
    x = 13,775.01

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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.