Home / 19,135.28-26,400.12-12,429.30

Finding the Fourth Proportional to 19,135.28, 26,400.12 and 12,429.30

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Solution

The fourth proportional to 19,135.28, 26,400.12 and 12,429.30 is: 17,148.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,135.28 : 26,400.12 = 12,429.30 : x
  2. Step 2: Convert to fraction form
    19,135.28/26,400.12 = 12,429.30/x
  3. Step 3: Cross multiply
    19,135.28x = 26,400.12 × 12,429.30
  4. Step 4: Simplify right side
    19,135.28x = 328,135,011.52
  5. Step 5: Solve for x
    x = 328,135,011.52/19,135.28
  6. Step 6: Final answer
    x = 17,148.17

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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.