Home / 20,111.95-30,127.83-15,708.79

Finding the Fourth Proportional to 20,111.95, 30,127.83 and 15,708.79

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Solution

The fourth proportional to 20,111.95, 30,127.83 and 15,708.79 is: 23,531.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.95 : 30,127.83 = 15,708.79 : x
  2. Step 2: Convert to fraction form
    20,111.95/30,127.83 = 15,708.79/x
  3. Step 3: Cross multiply
    20,111.95x = 30,127.83 × 15,708.79
  4. Step 4: Simplify right side
    20,111.95x = 473,271,754.63
  5. Step 5: Solve for x
    x = 473,271,754.63/20,111.95
  6. Step 6: Final answer
    x = 23,531.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.