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Finding the Fourth Proportional to 15,055.85, 20,780.53 and 10,020.29

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Solution

The fourth proportional to 15,055.85, 20,780.53 and 10,020.29 is: 13,830.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.85 : 20,780.53 = 10,020.29 : x
  2. Step 2: Convert to fraction form
    15,055.85/20,780.53 = 10,020.29/x
  3. Step 3: Cross multiply
    15,055.85x = 20,780.53 × 10,020.29
  4. Step 4: Simplify right side
    15,055.85x = 208,226,808.00
  5. Step 5: Solve for x
    x = 208,226,808.00/15,055.85
  6. Step 6: Final answer
    x = 13,830.29

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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.