Home / 7,125.20-10,681.40-6,347.60

Finding the Fourth Proportional to 7,125.20, 10,681.40 and 6,347.60

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Solution

The fourth proportional to 7,125.20, 10,681.40 and 6,347.60 is: 9,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.20 : 10,681.40 = 6,347.60 : x
  2. Step 2: Convert to fraction form
    7,125.20/10,681.40 = 6,347.60/x
  3. Step 3: Cross multiply
    7,125.20x = 10,681.40 × 6,347.60
  4. Step 4: Simplify right side
    7,125.20x = 67,801,254.64
  5. Step 5: Solve for x
    x = 67,801,254.64/7,125.20
  6. Step 6: Final answer
    x = 9,515.70

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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.