Home / 15,009.27-20,715.66-8,640.11

Finding the Fourth Proportional to 15,009.27, 20,715.66 and 8,640.11

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Solution

The fourth proportional to 15,009.27, 20,715.66 and 8,640.11 is: 11,925.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.27 : 20,715.66 = 8,640.11 : x
  2. Step 2: Convert to fraction form
    15,009.27/20,715.66 = 8,640.11/x
  3. Step 3: Cross multiply
    15,009.27x = 20,715.66 × 8,640.11
  4. Step 4: Simplify right side
    15,009.27x = 178,985,477.54
  5. Step 5: Solve for x
    x = 178,985,477.54/15,009.27
  6. Step 6: Final answer
    x = 11,925.00

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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.