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Finding the Fourth Proportional to 10,920.59, 15,069.93 and 6,678.77

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Solution

The fourth proportional to 10,920.59, 15,069.93 and 6,678.77 is: 9,216.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.59 : 15,069.93 = 6,678.77 : x
  2. Step 2: Convert to fraction form
    10,920.59/15,069.93 = 6,678.77/x
  3. Step 3: Cross multiply
    10,920.59x = 15,069.93 × 6,678.77
  4. Step 4: Simplify right side
    10,920.59x = 100,648,521.04
  5. Step 5: Solve for x
    x = 100,648,521.04/10,920.59
  6. Step 6: Final answer
    x = 9,216.40

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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.