Home / 31,939.78-47,916.35-10,878.16

Finding the Fourth Proportional to 31,939.78, 47,916.35 and 10,878.16

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Solution

The fourth proportional to 31,939.78, 47,916.35 and 10,878.16 is: 16,319.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,939.78 : 47,916.35 = 10,878.16 : x
  2. Step 2: Convert to fraction form
    31,939.78/47,916.35 = 10,878.16/x
  3. Step 3: Cross multiply
    31,939.78x = 47,916.35 × 10,878.16
  4. Step 4: Simplify right side
    31,939.78x = 521,241,721.92
  5. Step 5: Solve for x
    x = 521,241,721.92/31,939.78
  6. Step 6: Final answer
    x = 16,319.52

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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.