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Finding the Fourth Proportional to 6,661.40, 9,987.30 and 4,354.20

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Solution

The fourth proportional to 6,661.40, 9,987.30 and 4,354.20 is: 6,528.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.40 : 9,987.30 = 4,354.20 : x
  2. Step 2: Convert to fraction form
    6,661.40/9,987.30 = 4,354.20/x
  3. Step 3: Cross multiply
    6,661.40x = 9,987.30 × 4,354.20
  4. Step 4: Simplify right side
    6,661.40x = 43,486,701.66
  5. Step 5: Solve for x
    x = 43,486,701.66/6,661.40
  6. Step 6: Final answer
    x = 6,528.16

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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.