Home / 21,931.86-30,264.80-12,371.47

Finding the Fourth Proportional to 21,931.86, 30,264.80 and 12,371.47

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Solution

The fourth proportional to 21,931.86, 30,264.80 and 12,371.47 is: 17,071.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.86 : 30,264.80 = 12,371.47 : x
  2. Step 2: Convert to fraction form
    21,931.86/30,264.80 = 12,371.47/x
  3. Step 3: Cross multiply
    21,931.86x = 30,264.80 × 12,371.47
  4. Step 4: Simplify right side
    21,931.86x = 374,420,065.26
  5. Step 5: Solve for x
    x = 374,420,065.26/21,931.86
  6. Step 6: Final answer
    x = 17,071.97

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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.