Home / 8,990.23-12,406.56-5,215.63

Finding the Fourth Proportional to 8,990.23, 12,406.56 and 5,215.63

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Solution

The fourth proportional to 8,990.23, 12,406.56 and 5,215.63 is: 7,197.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.23 : 12,406.56 = 5,215.63 : x
  2. Step 2: Convert to fraction form
    8,990.23/12,406.56 = 5,215.63/x
  3. Step 3: Cross multiply
    8,990.23x = 12,406.56 × 5,215.63
  4. Step 4: Simplify right side
    8,990.23x = 64,708,026.53
  5. Step 5: Solve for x
    x = 64,708,026.53/8,990.23
  6. Step 6: Final answer
    x = 7,197.59

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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.