Home / 15,115.79-20,848.43-10,640.81

Finding the Fourth Proportional to 15,115.79, 20,848.43 and 10,640.81

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Solution

The fourth proportional to 15,115.79, 20,848.43 and 10,640.81 is: 14,676.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.79 : 20,848.43 = 10,640.81 : x
  2. Step 2: Convert to fraction form
    15,115.79/20,848.43 = 10,640.81/x
  3. Step 3: Cross multiply
    15,115.79x = 20,848.43 × 10,640.81
  4. Step 4: Simplify right side
    15,115.79x = 221,844,024.98
  5. Step 5: Solve for x
    x = 221,844,024.98/15,115.79
  6. Step 6: Final answer
    x = 14,676.32

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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.