Home / 21,256.80-31,886.40-6,466.20

Finding the Fourth Proportional to 21,256.80, 31,886.40 and 6,466.20

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Solution

The fourth proportional to 21,256.80, 31,886.40 and 6,466.20 is: 9,699.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.80 : 31,886.40 = 6,466.20 : x
  2. Step 2: Convert to fraction form
    21,256.80/31,886.40 = 6,466.20/x
  3. Step 3: Cross multiply
    21,256.80x = 31,886.40 × 6,466.20
  4. Step 4: Simplify right side
    21,256.80x = 206,183,839.68
  5. Step 5: Solve for x
    x = 206,183,839.68/21,256.80
  6. Step 6: Final answer
    x = 9,699.67

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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.