Home / 21,342.68-31,859.98-20,384.12

Finding the Fourth Proportional to 21,342.68, 31,859.98 and 20,384.12

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Solution

The fourth proportional to 21,342.68, 31,859.98 and 20,384.12 is: 30,429.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.68 : 31,859.98 = 20,384.12 : x
  2. Step 2: Convert to fraction form
    21,342.68/31,859.98 = 20,384.12/x
  3. Step 3: Cross multiply
    21,342.68x = 31,859.98 × 20,384.12
  4. Step 4: Simplify right side
    21,342.68x = 649,437,655.52
  5. Step 5: Solve for x
    x = 649,437,655.52/21,342.68
  6. Step 6: Final answer
    x = 30,429.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.