Home / 15,776.36-21,769.70-8,702.79

Finding the Fourth Proportional to 15,776.36, 21,769.70 and 8,702.79

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Solution

The fourth proportional to 15,776.36, 21,769.70 and 8,702.79 is: 12,008.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.36 : 21,769.70 = 8,702.79 : x
  2. Step 2: Convert to fraction form
    15,776.36/21,769.70 = 8,702.79/x
  3. Step 3: Cross multiply
    15,776.36x = 21,769.70 × 8,702.79
  4. Step 4: Simplify right side
    15,776.36x = 189,456,975.10
  5. Step 5: Solve for x
    x = 189,456,975.10/15,776.36
  6. Step 6: Final answer
    x = 12,008.92

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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.