Home / 15,655.85-21,605.95-9,286.21

Finding the Fourth Proportional to 15,655.85, 21,605.95 and 9,286.21

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Solution

The fourth proportional to 15,655.85, 21,605.95 and 9,286.21 is: 12,815.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655.85 : 21,605.95 = 9,286.21 : x
  2. Step 2: Convert to fraction form
    15,655.85/21,605.95 = 9,286.21/x
  3. Step 3: Cross multiply
    15,655.85x = 21,605.95 × 9,286.21
  4. Step 4: Simplify right side
    15,655.85x = 200,637,280.92
  5. Step 5: Solve for x
    x = 200,637,280.92/15,655.85
  6. Step 6: Final answer
    x = 12,815.49

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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.