Home / 15,835.95-21,815.55-13,318.11

Finding the Fourth Proportional to 15,835.95, 21,815.55 and 13,318.11

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Solution

The fourth proportional to 15,835.95, 21,815.55 and 13,318.11 is: 18,346.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,835.95 : 21,815.55 = 13,318.11 : x
  2. Step 2: Convert to fraction form
    15,835.95/21,815.55 = 13,318.11/x
  3. Step 3: Cross multiply
    15,835.95x = 21,815.55 × 13,318.11
  4. Step 4: Simplify right side
    15,835.95x = 290,541,894.61
  5. Step 5: Solve for x
    x = 290,541,894.61/15,835.95
  6. Step 6: Final answer
    x = 18,346.98

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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.