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Finding the Fourth Proportional to 15,055.65, 20,780.28 and 10,020.09

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Solution

The fourth proportional to 15,055.65, 20,780.28 and 10,020.09 is: 13,830.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.65 : 20,780.28 = 10,020.09 : x
  2. Step 2: Convert to fraction form
    15,055.65/20,780.28 = 10,020.09/x
  3. Step 3: Cross multiply
    15,055.65x = 20,780.28 × 10,020.09
  4. Step 4: Simplify right side
    15,055.65x = 208,220,275.83
  5. Step 5: Solve for x
    x = 208,220,275.83/15,055.65
  6. Step 6: Final answer
    x = 13,830.04

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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.