Home / 20,856.16-31,285.20-7,706.08

Finding the Fourth Proportional to 20,856.16, 31,285.20 and 7,706.08

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Solution

The fourth proportional to 20,856.16, 31,285.20 and 7,706.08 is: 11,559.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.16 : 31,285.20 = 7,706.08 : x
  2. Step 2: Convert to fraction form
    20,856.16/31,285.20 = 7,706.08/x
  3. Step 3: Cross multiply
    20,856.16x = 31,285.20 × 7,706.08
  4. Step 4: Simplify right side
    20,856.16x = 241,086,254.02
  5. Step 5: Solve for x
    x = 241,086,254.02/20,856.16
  6. Step 6: Final answer
    x = 11,559.47

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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.