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Finding the Fourth Proportional to 10,920.63, 15,080.00 and 8,558.67

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Solution

The fourth proportional to 10,920.63, 15,080.00 and 8,558.67 is: 11,818.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.63 : 15,080.00 = 8,558.67 : x
  2. Step 2: Convert to fraction form
    10,920.63/15,080.00 = 8,558.67/x
  3. Step 3: Cross multiply
    10,920.63x = 15,080.00 × 8,558.67
  4. Step 4: Simplify right side
    10,920.63x = 129,064,700.81
  5. Step 5: Solve for x
    x = 129,064,700.81/10,920.63
  6. Step 6: Final answer
    x = 11,818.43

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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.