Home / 10,920.10-15,069.68-6,140.05

Finding the Fourth Proportional to 10,920.10, 15,069.68 and 6,140.05

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Solution

The fourth proportional to 10,920.10, 15,069.68 and 6,140.05 is: 8,473.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.10 : 15,069.68 = 6,140.05 : x
  2. Step 2: Convert to fraction form
    10,920.10/15,069.68 = 6,140.05/x
  3. Step 3: Cross multiply
    10,920.10x = 15,069.68 × 6,140.05
  4. Step 4: Simplify right side
    10,920.10x = 92,528,654.01
  5. Step 5: Solve for x
    x = 92,528,654.01/10,920.10
  6. Step 6: Final answer
    x = 8,473.24

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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.