Home / 9,819.10-13,547.55-6,279.40

Finding the Fourth Proportional to 9,819.10, 13,547.55 and 6,279.40

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Solution

The fourth proportional to 9,819.10, 13,547.55 and 6,279.40 is: 8,663.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,819.10 : 13,547.55 = 6,279.40 : x
  2. Step 2: Convert to fraction form
    9,819.10/13,547.55 = 6,279.40/x
  3. Step 3: Cross multiply
    9,819.10x = 13,547.55 × 6,279.40
  4. Step 4: Simplify right side
    9,819.10x = 85,070,485.47
  5. Step 5: Solve for x
    x = 85,070,485.47/9,819.10
  6. Step 6: Final answer
    x = 8,663.78

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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.