Home / 20,909.08-31,347.18-14,315.28

Finding the Fourth Proportional to 20,909.08, 31,347.18 and 14,315.28

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Solution

The fourth proportional to 20,909.08, 31,347.18 and 14,315.28 is: 21,461.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.08 : 31,347.18 = 14,315.28 : x
  2. Step 2: Convert to fraction form
    20,909.08/31,347.18 = 14,315.28/x
  3. Step 3: Cross multiply
    20,909.08x = 31,347.18 × 14,315.28
  4. Step 4: Simplify right side
    20,909.08x = 448,743,658.91
  5. Step 5: Solve for x
    x = 448,743,658.91/20,909.08
  6. Step 6: Final answer
    x = 21,461.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.