Home / 8,916.06-12,305.51-5,139.78

Finding the Fourth Proportional to 8,916.06, 12,305.51 and 5,139.78

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Solution

The fourth proportional to 8,916.06, 12,305.51 and 5,139.78 is: 7,093.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.06 : 12,305.51 = 5,139.78 : x
  2. Step 2: Convert to fraction form
    8,916.06/12,305.51 = 5,139.78/x
  3. Step 3: Cross multiply
    8,916.06x = 12,305.51 × 5,139.78
  4. Step 4: Simplify right side
    8,916.06x = 63,247,614.19
  5. Step 5: Solve for x
    x = 63,247,614.19/8,916.06
  6. Step 6: Final answer
    x = 7,093.67

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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.