Home / 28,345.12-39,116.28-15,769.88

Finding the Fourth Proportional to 28,345.12, 39,116.28 and 15,769.88

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Solution

The fourth proportional to 28,345.12, 39,116.28 and 15,769.88 is: 21,762.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.12 : 39,116.28 = 15,769.88 : x
  2. Step 2: Convert to fraction form
    28,345.12/39,116.28 = 15,769.88/x
  3. Step 3: Cross multiply
    28,345.12x = 39,116.28 × 15,769.88
  4. Step 4: Simplify right side
    28,345.12x = 616,859,041.65
  5. Step 5: Solve for x
    x = 616,859,041.65/28,345.12
  6. Step 6: Final answer
    x = 21,762.44

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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.