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Finding the Fourth Proportional to 9,869.95, 13,619.95 and 5,393.74

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Solution

The fourth proportional to 9,869.95, 13,619.95 and 5,393.74 is: 7,443.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,869.95 : 13,619.95 = 5,393.74 : x
  2. Step 2: Convert to fraction form
    9,869.95/13,619.95 = 5,393.74/x
  3. Step 3: Cross multiply
    9,869.95x = 13,619.95 × 5,393.74
  4. Step 4: Simplify right side
    9,869.95x = 73,462,401.01
  5. Step 5: Solve for x
    x = 73,462,401.01/9,869.95
  6. Step 6: Final answer
    x = 7,443.04

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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.