Home / 7,621.40-11,432.10-4,165.40

Finding the Fourth Proportional to 7,621.40, 11,432.10 and 4,165.40

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Solution

The fourth proportional to 7,621.40, 11,432.10 and 4,165.40 is: 6,248.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.40 : 11,432.10 = 4,165.40 : x
  2. Step 2: Convert to fraction form
    7,621.40/11,432.10 = 4,165.40/x
  3. Step 3: Cross multiply
    7,621.40x = 11,432.10 × 4,165.40
  4. Step 4: Simplify right side
    7,621.40x = 47,619,269.34
  5. Step 5: Solve for x
    x = 47,619,269.34/7,621.40
  6. Step 6: Final answer
    x = 6,248.10

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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.