Home / 13,319.79-18,381.18-7,351.50

Finding the Fourth Proportional to 13,319.79, 18,381.18 and 7,351.50

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Solution

The fourth proportional to 13,319.79, 18,381.18 and 7,351.50 is: 10,145.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.79 : 18,381.18 = 7,351.50 : x
  2. Step 2: Convert to fraction form
    13,319.79/18,381.18 = 7,351.50/x
  3. Step 3: Cross multiply
    13,319.79x = 18,381.18 × 7,351.50
  4. Step 4: Simplify right side
    13,319.79x = 135,129,244.77
  5. Step 5: Solve for x
    x = 135,129,244.77/13,319.79
  6. Step 6: Final answer
    x = 10,145.00

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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.