Home / 28,428.50-39,232.14-15,854.06

Finding the Fourth Proportional to 28,428.50, 39,232.14 and 15,854.06

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Solution

The fourth proportional to 28,428.50, 39,232.14 and 15,854.06 is: 21,879.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.50 : 39,232.14 = 15,854.06 : x
  2. Step 2: Convert to fraction form
    28,428.50/39,232.14 = 15,854.06/x
  3. Step 3: Cross multiply
    28,428.50x = 39,232.14 × 15,854.06
  4. Step 4: Simplify right side
    28,428.50x = 621,988,701.49
  5. Step 5: Solve for x
    x = 621,988,701.49/28,428.50
  6. Step 6: Final answer
    x = 21,879.05

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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.