Home / 25,826.80-38,740.20-19,987.60

Finding the Fourth Proportional to 25,826.80, 38,740.20 and 19,987.60

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Solution

The fourth proportional to 25,826.80, 38,740.20 and 19,987.60 is: 29,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,826.80 : 38,740.20 = 19,987.60 : x
  2. Step 2: Convert to fraction form
    25,826.80/38,740.20 = 19,987.60/x
  3. Step 3: Cross multiply
    25,826.80x = 38,740.20 × 19,987.60
  4. Step 4: Simplify right side
    25,826.80x = 774,323,621.52
  5. Step 5: Solve for x
    x = 774,323,621.52/25,826.80
  6. Step 6: Final answer
    x = 29,981.40

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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.