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Finding the Fourth Proportional to 19,281.60, 28,922.40 and 10,964.16

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Solution

The fourth proportional to 19,281.60, 28,922.40 and 10,964.16 is: 16,446.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,281.60 : 28,922.40 = 10,964.16 : x
  2. Step 2: Convert to fraction form
    19,281.60/28,922.40 = 10,964.16/x
  3. Step 3: Cross multiply
    19,281.60x = 28,922.40 × 10,964.16
  4. Step 4: Simplify right side
    19,281.60x = 317,109,821.18
  5. Step 5: Solve for x
    x = 317,109,821.18/19,281.60
  6. Step 6: Final answer
    x = 16,446.24

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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.