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Finding the Fourth Proportional to 7,041.18, 9,720.63 and 5,641.50

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Solution

The fourth proportional to 7,041.18, 9,720.63 and 5,641.50 is: 7,788.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,041.18 : 9,720.63 = 5,641.50 : x
  2. Step 2: Convert to fraction form
    7,041.18/9,720.63 = 5,641.50/x
  3. Step 3: Cross multiply
    7,041.18x = 9,720.63 × 5,641.50
  4. Step 4: Simplify right side
    7,041.18x = 54,838,934.15
  5. Step 5: Solve for x
    x = 54,838,934.15/7,041.18
  6. Step 6: Final answer
    x = 7,788.32

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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.