Home / 12,403.96-17,123.79-7,871.26

Finding the Fourth Proportional to 12,403.96, 17,123.79 and 7,871.26

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Solution

The fourth proportional to 12,403.96, 17,123.79 and 7,871.26 is: 10,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,403.96 : 17,123.79 = 7,871.26 : x
  2. Step 2: Convert to fraction form
    12,403.96/17,123.79 = 7,871.26/x
  3. Step 3: Cross multiply
    12,403.96x = 17,123.79 × 7,871.26
  4. Step 4: Simplify right side
    12,403.96x = 134,785,803.28
  5. Step 5: Solve for x
    x = 134,785,803.28/12,403.96
  6. Step 6: Final answer
    x = 10,866.35

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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.