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Finding the Fourth Proportional to 7,070.40, 9,761.38 and 4,421.40

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Solution

The fourth proportional to 7,070.40, 9,761.38 and 4,421.40 is: 6,104.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,070.40 : 9,761.38 = 4,421.40 : x
  2. Step 2: Convert to fraction form
    7,070.40/9,761.38 = 4,421.40/x
  3. Step 3: Cross multiply
    7,070.40x = 9,761.38 × 4,421.40
  4. Step 4: Simplify right side
    7,070.40x = 43,158,965.53
  5. Step 5: Solve for x
    x = 43,158,965.53/7,070.40
  6. Step 6: Final answer
    x = 6,104.18

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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.