Home / 21,897.28-30,148.80-19,901.68

Finding the Fourth Proportional to 21,897.28, 30,148.80 and 19,901.68

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Solution

The fourth proportional to 21,897.28, 30,148.80 and 19,901.68 is: 27,401.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,897.28 : 30,148.80 = 19,901.68 : x
  2. Step 2: Convert to fraction form
    21,897.28/30,148.80 = 19,901.68/x
  3. Step 3: Cross multiply
    21,897.28x = 30,148.80 × 19,901.68
  4. Step 4: Simplify right side
    21,897.28x = 600,011,769.98
  5. Step 5: Solve for x
    x = 600,011,769.98/21,897.28
  6. Step 6: Final answer
    x = 27,401.20

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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.