Home / 20,826.56-31,217.60-9,720.32

Finding the Fourth Proportional to 20,826.56, 31,217.60 and 9,720.32

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Solution

The fourth proportional to 20,826.56, 31,217.60 and 9,720.32 is: 14,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.56 : 31,217.60 = 9,720.32 : x
  2. Step 2: Convert to fraction form
    20,826.56/31,217.60 = 9,720.32/x
  3. Step 3: Cross multiply
    20,826.56x = 31,217.60 × 9,720.32
  4. Step 4: Simplify right side
    20,826.56x = 303,445,061.63
  5. Step 5: Solve for x
    x = 303,445,061.63/20,826.56
  6. Step 6: Final answer
    x = 14,570.10

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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.