Home / 6,431.80-8,875.18-3,915.24

Finding the Fourth Proportional to 6,431.80, 8,875.18 and 3,915.24

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Solution

The fourth proportional to 6,431.80, 8,875.18 and 3,915.24 is: 5,402.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.80 : 8,875.18 = 3,915.24 : x
  2. Step 2: Convert to fraction form
    6,431.80/8,875.18 = 3,915.24/x
  3. Step 3: Cross multiply
    6,431.80x = 8,875.18 × 3,915.24
  4. Step 4: Simplify right side
    6,431.80x = 34,748,459.74
  5. Step 5: Solve for x
    x = 34,748,459.74/6,431.80
  6. Step 6: Final answer
    x = 5,402.60

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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.