Home / 38,685.78-58,029.49-12,390.45

Finding the Fourth Proportional to 38,685.78, 58,029.49 and 12,390.45

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Solution

The fourth proportional to 38,685.78, 58,029.49 and 12,390.45 is: 18,585.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,685.78 : 58,029.49 = 12,390.45 : x
  2. Step 2: Convert to fraction form
    38,685.78/58,029.49 = 12,390.45/x
  3. Step 3: Cross multiply
    38,685.78x = 58,029.49 × 12,390.45
  4. Step 4: Simplify right side
    38,685.78x = 719,011,494.37
  5. Step 5: Solve for x
    x = 719,011,494.37/38,685.78
  6. Step 6: Final answer
    x = 18,585.94

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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.