Home / 10,140.72-15,209.16-6,390.96

Finding the Fourth Proportional to 10,140.72, 15,209.16 and 6,390.96

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Solution

The fourth proportional to 10,140.72, 15,209.16 and 6,390.96 is: 9,585.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,140.72 : 15,209.16 = 6,390.96 : x
  2. Step 2: Convert to fraction form
    10,140.72/15,209.16 = 6,390.96/x
  3. Step 3: Cross multiply
    10,140.72x = 15,209.16 × 6,390.96
  4. Step 4: Simplify right side
    10,140.72x = 97,201,133.19
  5. Step 5: Solve for x
    x = 97,201,133.19/10,140.72
  6. Step 6: Final answer
    x = 9,585.23

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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.