Home / 15,148.89-20,905.47-8,776.72

Finding the Fourth Proportional to 15,148.89, 20,905.47 and 8,776.72

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Solution

The fourth proportional to 15,148.89, 20,905.47 and 8,776.72 is: 12,111.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,148.89 : 20,905.47 = 8,776.72 : x
  2. Step 2: Convert to fraction form
    15,148.89/20,905.47 = 8,776.72/x
  3. Step 3: Cross multiply
    15,148.89x = 20,905.47 × 8,776.72
  4. Step 4: Simplify right side
    15,148.89x = 183,481,352.13
  5. Step 5: Solve for x
    x = 183,481,352.13/15,148.89
  6. Step 6: Final answer
    x = 12,111.87

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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.