Home / 15,499.85-21,389.95-8,426.43

Finding the Fourth Proportional to 15,499.85, 21,389.95 and 8,426.43

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Solution

The fourth proportional to 15,499.85, 21,389.95 and 8,426.43 is: 11,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,499.85 : 21,389.95 = 8,426.43 : x
  2. Step 2: Convert to fraction form
    15,499.85/21,389.95 = 8,426.43/x
  3. Step 3: Cross multiply
    15,499.85x = 21,389.95 × 8,426.43
  4. Step 4: Simplify right side
    15,499.85x = 180,240,815.10
  5. Step 5: Solve for x
    x = 180,240,815.10/15,499.85
  6. Step 6: Final answer
    x = 11,628.55

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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.