Home / 28,478.95-39,300.14-15,731.93

Finding the Fourth Proportional to 28,478.95, 39,300.14 and 15,731.93

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Solution

The fourth proportional to 28,478.95, 39,300.14 and 15,731.93 is: 21,709.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.95 : 39,300.14 = 15,731.93 : x
  2. Step 2: Convert to fraction form
    28,478.95/39,300.14 = 15,731.93/x
  3. Step 3: Cross multiply
    28,478.95x = 39,300.14 × 15,731.93
  4. Step 4: Simplify right side
    28,478.95x = 618,267,189.05
  5. Step 5: Solve for x
    x = 618,267,189.05/28,478.95
  6. Step 6: Final answer
    x = 21,709.62

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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.