Home / 12,678.38-18,926.10-10,712.30

Finding the Fourth Proportional to 12,678.38, 18,926.10 and 10,712.30

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Solution

The fourth proportional to 12,678.38, 18,926.10 and 10,712.30 is: 15,991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.38 : 18,926.10 = 10,712.30 : x
  2. Step 2: Convert to fraction form
    12,678.38/18,926.10 = 10,712.30/x
  3. Step 3: Cross multiply
    12,678.38x = 18,926.10 × 10,712.30
  4. Step 4: Simplify right side
    12,678.38x = 202,742,007.47
  5. Step 5: Solve for x
    x = 202,742,007.47/12,678.38
  6. Step 6: Final answer
    x = 15,991.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.