Home / 10,289.24-15,419.10-6,391.40

Finding the Fourth Proportional to 10,289.24, 15,419.10 and 6,391.40

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Solution

The fourth proportional to 10,289.24, 15,419.10 and 6,391.40 is: 9,577.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,289.24 : 15,419.10 = 6,391.40 : x
  2. Step 2: Convert to fraction form
    10,289.24/15,419.10 = 6,391.40/x
  3. Step 3: Cross multiply
    10,289.24x = 15,419.10 × 6,391.40
  4. Step 4: Simplify right side
    10,289.24x = 98,549,635.74
  5. Step 5: Solve for x
    x = 98,549,635.74/10,289.24
  6. Step 6: Final answer
    x = 9,577.93

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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.