Home / 21,854.51-30,117.27-15,127.66

Finding the Fourth Proportional to 21,854.51, 30,117.27 and 15,127.66

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Solution

The fourth proportional to 21,854.51, 30,117.27 and 15,127.66 is: 20,847.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854.51 : 30,117.27 = 15,127.66 : x
  2. Step 2: Convert to fraction form
    21,854.51/30,117.27 = 15,127.66/x
  3. Step 3: Cross multiply
    21,854.51x = 30,117.27 × 15,127.66
  4. Step 4: Simplify right side
    21,854.51x = 455,603,829.97
  5. Step 5: Solve for x
    x = 455,603,829.97/21,854.51
  6. Step 6: Final answer
    x = 20,847.13

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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.