Home / 13,319.51-18,381.38-7,655.31

Finding the Fourth Proportional to 13,319.51, 18,381.38 and 7,655.31

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Solution

The fourth proportional to 13,319.51, 18,381.38 and 7,655.31 is: 10,564.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.51 : 18,381.38 = 7,655.31 : x
  2. Step 2: Convert to fraction form
    13,319.51/18,381.38 = 7,655.31/x
  3. Step 3: Cross multiply
    13,319.51x = 18,381.38 × 7,655.31
  4. Step 4: Simplify right side
    13,319.51x = 140,715,123.85
  5. Step 5: Solve for x
    x = 140,715,123.85/13,319.51
  6. Step 6: Final answer
    x = 10,564.59

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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.