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Finding the Fourth Proportional to 8,955.20, 13,443.60 and 8,890.40

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Solution

The fourth proportional to 8,955.20, 13,443.60 and 8,890.40 is: 13,346.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,955.20 : 13,443.60 = 8,890.40 : x
  2. Step 2: Convert to fraction form
    8,955.20/13,443.60 = 8,890.40/x
  3. Step 3: Cross multiply
    8,955.20x = 13,443.60 × 8,890.40
  4. Step 4: Simplify right side
    8,955.20x = 119,518,981.44
  5. Step 5: Solve for x
    x = 119,518,981.44/8,955.20
  6. Step 6: Final answer
    x = 13,346.32

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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.