Home / 28,345.54-39,115.80-15,770.02

Finding the Fourth Proportional to 28,345.54, 39,115.80 and 15,770.02

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Solution

The fourth proportional to 28,345.54, 39,115.80 and 15,770.02 is: 21,762.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.54 : 39,115.80 = 15,770.02 : x
  2. Step 2: Convert to fraction form
    28,345.54/39,115.80 = 15,770.02/x
  3. Step 3: Cross multiply
    28,345.54x = 39,115.80 × 15,770.02
  4. Step 4: Simplify right side
    28,345.54x = 616,856,948.32
  5. Step 5: Solve for x
    x = 616,856,948.32/28,345.54
  6. Step 6: Final answer
    x = 21,762.05

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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.