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Finding the Fourth Proportional to 9,842.78, 14,752.20 and 4,289.60

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Solution

The fourth proportional to 9,842.78, 14,752.20 and 4,289.60 is: 6,429.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,842.78 : 14,752.20 = 4,289.60 : x
  2. Step 2: Convert to fraction form
    9,842.78/14,752.20 = 4,289.60/x
  3. Step 3: Cross multiply
    9,842.78x = 14,752.20 × 4,289.60
  4. Step 4: Simplify right side
    9,842.78x = 63,281,037.12
  5. Step 5: Solve for x
    x = 63,281,037.12/9,842.78
  6. Step 6: Final answer
    x = 6,429.18

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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.