Home / 18,428.64-25,430.17-11,355.18

Finding the Fourth Proportional to 18,428.64, 25,430.17 and 11,355.18

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Solution

The fourth proportional to 18,428.64, 25,430.17 and 11,355.18 is: 15,669.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.64 : 25,430.17 = 11,355.18 : x
  2. Step 2: Convert to fraction form
    18,428.64/25,430.17 = 11,355.18/x
  3. Step 3: Cross multiply
    18,428.64x = 25,430.17 × 11,355.18
  4. Step 4: Simplify right side
    18,428.64x = 288,764,157.78
  5. Step 5: Solve for x
    x = 288,764,157.78/18,428.64
  6. Step 6: Final answer
    x = 15,669.31

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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.