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Finding the Fourth Proportional to 9,840.60, 14,765.10 and 5,164.20

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Solution

The fourth proportional to 9,840.60, 14,765.10 and 5,164.20 is: 7,748.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,840.60 : 14,765.10 = 5,164.20 : x
  2. Step 2: Convert to fraction form
    9,840.60/14,765.10 = 5,164.20/x
  3. Step 3: Cross multiply
    9,840.60x = 14,765.10 × 5,164.20
  4. Step 4: Simplify right side
    9,840.60x = 76,249,929.42
  5. Step 5: Solve for x
    x = 76,249,929.42/9,840.60
  6. Step 6: Final answer
    x = 7,748.50

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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.