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Finding the Fourth Proportional to 9,870.60, 14,805.90 and 7,667.40

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Solution

The fourth proportional to 9,870.60, 14,805.90 and 7,667.40 is: 11,501.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,870.60 : 14,805.90 = 7,667.40 : x
  2. Step 2: Convert to fraction form
    9,870.60/14,805.90 = 7,667.40/x
  3. Step 3: Cross multiply
    9,870.60x = 14,805.90 × 7,667.40
  4. Step 4: Simplify right side
    9,870.60x = 113,522,757.66
  5. Step 5: Solve for x
    x = 113,522,757.66/9,870.60
  6. Step 6: Final answer
    x = 11,501.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.