Home / 31,000.15-42,780.63-16,853.29

Finding the Fourth Proportional to 31,000.15, 42,780.63 and 16,853.29

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Solution

The fourth proportional to 31,000.15, 42,780.63 and 16,853.29 is: 23,257.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,000.15 : 42,780.63 = 16,853.29 : x
  2. Step 2: Convert to fraction form
    31,000.15/42,780.63 = 16,853.29/x
  3. Step 3: Cross multiply
    31,000.15x = 42,780.63 × 16,853.29
  4. Step 4: Simplify right side
    31,000.15x = 720,994,363.77
  5. Step 5: Solve for x
    x = 720,994,363.77/31,000.15
  6. Step 6: Final answer
    x = 23,257.77

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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.