Home / 15,527.78-21,428.21-8,454.18

Finding the Fourth Proportional to 15,527.78, 21,428.21 and 8,454.18

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Solution

The fourth proportional to 15,527.78, 21,428.21 and 8,454.18 is: 11,666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,527.78 : 21,428.21 = 8,454.18 : x
  2. Step 2: Convert to fraction form
    15,527.78/21,428.21 = 8,454.18/x
  3. Step 3: Cross multiply
    15,527.78x = 21,428.21 × 8,454.18
  4. Step 4: Simplify right side
    15,527.78x = 181,157,902.15
  5. Step 5: Solve for x
    x = 181,157,902.15/15,527.78
  6. Step 6: Final answer
    x = 11,666.70

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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.