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Finding the Fourth Proportional to 6,918.60, 9,547.74 and 3,774.90

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Solution

The fourth proportional to 6,918.60, 9,547.74 and 3,774.90 is: 5,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.60 : 9,547.74 = 3,774.90 : x
  2. Step 2: Convert to fraction form
    6,918.60/9,547.74 = 3,774.90/x
  3. Step 3: Cross multiply
    6,918.60x = 9,547.74 × 3,774.90
  4. Step 4: Simplify right side
    6,918.60x = 36,041,763.73
  5. Step 5: Solve for x
    x = 36,041,763.73/6,918.60
  6. Step 6: Final answer
    x = 5,209.40

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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.