Home / 21,909.75-30,240.18-13,950.29

Finding the Fourth Proportional to 21,909.75, 30,240.18 and 13,950.29

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Solution

The fourth proportional to 21,909.75, 30,240.18 and 13,950.29 is: 19,254.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.75 : 30,240.18 = 13,950.29 : x
  2. Step 2: Convert to fraction form
    21,909.75/30,240.18 = 13,950.29/x
  3. Step 3: Cross multiply
    21,909.75x = 30,240.18 × 13,950.29
  4. Step 4: Simplify right side
    21,909.75x = 421,859,129.45
  5. Step 5: Solve for x
    x = 421,859,129.45/21,909.75
  6. Step 6: Final answer
    x = 19,254.40

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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.