Home / 10,303.40-15,418.11-8,921.45

Finding the Fourth Proportional to 10,303.40, 15,418.11 and 8,921.45

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Solution

The fourth proportional to 10,303.40, 15,418.11 and 8,921.45 is: 13,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,303.40 : 15,418.11 = 8,921.45 : x
  2. Step 2: Convert to fraction form
    10,303.40/15,418.11 = 8,921.45/x
  3. Step 3: Cross multiply
    10,303.40x = 15,418.11 × 8,921.45
  4. Step 4: Simplify right side
    10,303.40x = 137,551,897.46
  5. Step 5: Solve for x
    x = 137,551,897.46/10,303.40
  6. Step 6: Final answer
    x = 13,350.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.