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Finding the Fourth Proportional to 7,547.90, 11,321.85 and 5,603.90

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Solution

The fourth proportional to 7,547.90, 11,321.85 and 5,603.90 is: 8,405.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,547.90 : 11,321.85 = 5,603.90 : x
  2. Step 2: Convert to fraction form
    7,547.90/11,321.85 = 5,603.90/x
  3. Step 3: Cross multiply
    7,547.90x = 11,321.85 × 5,603.90
  4. Step 4: Simplify right side
    7,547.90x = 63,446,515.22
  5. Step 5: Solve for x
    x = 63,446,515.22/7,547.90
  6. Step 6: Final answer
    x = 8,405.85

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Similar ratio
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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.