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Finding the Fourth Proportional to 10,894.80, 15,019.88 and 9,787.68

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Solution

The fourth proportional to 10,894.80, 15,019.88 and 9,787.68 is: 13,493.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,894.80 : 15,019.88 = 9,787.68 : x
  2. Step 2: Convert to fraction form
    10,894.80/15,019.88 = 9,787.68/x
  3. Step 3: Cross multiply
    10,894.80x = 15,019.88 × 9,787.68
  4. Step 4: Simplify right side
    10,894.80x = 147,009,779.08
  5. Step 5: Solve for x
    x = 147,009,779.08/10,894.80
  6. Step 6: Final answer
    x = 13,493.57

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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.