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Finding the Fourth Proportional to 15,368.99, 21,209.18 and 8,654.29

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Solution

The fourth proportional to 15,368.99, 21,209.18 and 8,654.29 is: 11,942.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,368.99 : 21,209.18 = 8,654.29 : x
  2. Step 2: Convert to fraction form
    15,368.99/21,209.18 = 8,654.29/x
  3. Step 3: Cross multiply
    15,368.99x = 21,209.18 × 8,654.29
  4. Step 4: Simplify right side
    15,368.99x = 183,550,298.09
  5. Step 5: Solve for x
    x = 183,550,298.09/15,368.99
  6. Step 6: Final answer
    x = 11,942.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.