Home / 28,205.20-42,307.80-25,386.40

Finding the Fourth Proportional to 28,205.20, 42,307.80 and 25,386.40

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Solution

The fourth proportional to 28,205.20, 42,307.80 and 25,386.40 is: 38,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.20 : 42,307.80 = 25,386.40 : x
  2. Step 2: Convert to fraction form
    28,205.20/42,307.80 = 25,386.40/x
  3. Step 3: Cross multiply
    28,205.20x = 42,307.80 × 25,386.40
  4. Step 4: Simplify right side
    28,205.20x = 1,074,042,733.92
  5. Step 5: Solve for x
    x = 1,074,042,733.92/28,205.20
  6. Step 6: Final answer
    x = 38,079.60

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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.