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Finding the Fourth Proportional to 15,812.96, 21,804.08 and 10,780.11

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Solution

The fourth proportional to 15,812.96, 21,804.08 and 10,780.11 is: 14,864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.96 : 21,804.08 = 10,780.11 : x
  2. Step 2: Convert to fraction form
    15,812.96/21,804.08 = 10,780.11/x
  3. Step 3: Cross multiply
    15,812.96x = 21,804.08 × 10,780.11
  4. Step 4: Simplify right side
    15,812.96x = 235,050,326.95
  5. Step 5: Solve for x
    x = 235,050,326.95/15,812.96
  6. Step 6: Final answer
    x = 14,864.42

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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.