Home / 15,639.87-21,592.40-9,679.53

Finding the Fourth Proportional to 15,639.87, 21,592.40 and 9,679.53

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Solution

The fourth proportional to 15,639.87, 21,592.40 and 9,679.53 is: 13,363.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.87 : 21,592.40 = 9,679.53 : x
  2. Step 2: Convert to fraction form
    15,639.87/21,592.40 = 9,679.53/x
  3. Step 3: Cross multiply
    15,639.87x = 21,592.40 × 9,679.53
  4. Step 4: Simplify right side
    15,639.87x = 209,004,235.17
  5. Step 5: Solve for x
    x = 209,004,235.17/15,639.87
  6. Step 6: Final answer
    x = 13,363.55

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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.