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Finding the Fourth Proportional to 5,659, 8,488.74 and 1,555

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Solution

The fourth proportional to 5,659, 8,488.74 and 1,555 is: 2,332.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,659 : 8,488.74 = 1,555 : x
  2. Step 2: Convert to fraction form
    5,659/8,488.74 = 1,555/x
  3. Step 3: Cross multiply
    5,659x = 8,488.74 × 1,555
  4. Step 4: Simplify right side
    5,659x = 13,199,990.70
  5. Step 5: Solve for x
    x = 13,199,990.70/5,659
  6. Step 6: Final answer
    x = 2,332.57

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Double scale
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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.