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Finding the Fourth Proportional to 12,687.30, 19,030.95 and 10,646.10

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Solution

The fourth proportional to 12,687.30, 19,030.95 and 10,646.10 is: 15,969.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.30 : 19,030.95 = 10,646.10 : x
  2. Step 2: Convert to fraction form
    12,687.30/19,030.95 = 10,646.10/x
  3. Step 3: Cross multiply
    12,687.30x = 19,030.95 × 10,646.10
  4. Step 4: Simplify right side
    12,687.30x = 202,605,396.80
  5. Step 5: Solve for x
    x = 202,605,396.80/12,687.30
  6. Step 6: Final answer
    x = 15,969.15

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Similar ratio
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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.