Home / 12,865.40-19,285.02-8,705.82

Finding the Fourth Proportional to 12,865.40, 19,285.02 and 8,705.82

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Solution

The fourth proportional to 12,865.40, 19,285.02 and 8,705.82 is: 13,049.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.40 : 19,285.02 = 8,705.82 : x
  2. Step 2: Convert to fraction form
    12,865.40/19,285.02 = 8,705.82/x
  3. Step 3: Cross multiply
    12,865.40x = 19,285.02 × 8,705.82
  4. Step 4: Simplify right side
    12,865.40x = 167,891,985.14
  5. Step 5: Solve for x
    x = 167,891,985.14/12,865.40
  6. Step 6: Final answer
    x = 13,049.89

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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.