Home / 30,878.74-42,612.81-16,731.58

Finding the Fourth Proportional to 30,878.74, 42,612.81 and 16,731.58

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Solution

The fourth proportional to 30,878.74, 42,612.81 and 16,731.58 is: 23,089.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,878.74 : 42,612.81 = 16,731.58 : x
  2. Step 2: Convert to fraction form
    30,878.74/42,612.81 = 16,731.58/x
  3. Step 3: Cross multiply
    30,878.74x = 42,612.81 × 16,731.58
  4. Step 4: Simplify right side
    30,878.74x = 712,979,639.54
  5. Step 5: Solve for x
    x = 712,979,639.54/30,878.74
  6. Step 6: Final answer
    x = 23,089.66

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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.