Home / 15,406.20-21,223.71-14,655.80

Finding the Fourth Proportional to 15,406.20, 21,223.71 and 14,655.80

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Solution

The fourth proportional to 15,406.20, 21,223.71 and 14,655.80 is: 20,189.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,406.20 : 21,223.71 = 14,655.80 : x
  2. Step 2: Convert to fraction form
    15,406.20/21,223.71 = 14,655.80/x
  3. Step 3: Cross multiply
    15,406.20x = 21,223.71 × 14,655.80
  4. Step 4: Simplify right side
    15,406.20x = 311,050,502.08
  5. Step 5: Solve for x
    x = 311,050,502.08/15,406.20
  6. Step 6: Final answer
    x = 20,189.96

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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.