Home / 25,205.13-34,778.73-15,139.10

Finding the Fourth Proportional to 25,205.13, 34,778.73 and 15,139.10

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Solution

The fourth proportional to 25,205.13, 34,778.73 and 15,139.10 is: 20,889.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,205.13 : 34,778.73 = 15,139.10 : x
  2. Step 2: Convert to fraction form
    25,205.13/34,778.73 = 15,139.10/x
  3. Step 3: Cross multiply
    25,205.13x = 34,778.73 × 15,139.10
  4. Step 4: Simplify right side
    25,205.13x = 526,518,497.45
  5. Step 5: Solve for x
    x = 526,518,497.45/25,205.13
  6. Step 6: Final answer
    x = 20,889.34

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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.