Home / 13,378.05-18,459.96-7,713.01

Finding the Fourth Proportional to 13,378.05, 18,459.96 and 7,713.01

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Solution

The fourth proportional to 13,378.05, 18,459.96 and 7,713.01 is: 10,642.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.05 : 18,459.96 = 7,713.01 : x
  2. Step 2: Convert to fraction form
    13,378.05/18,459.96 = 7,713.01/x
  3. Step 3: Cross multiply
    13,378.05x = 18,459.96 × 7,713.01
  4. Step 4: Simplify right side
    13,378.05x = 142,381,856.08
  5. Step 5: Solve for x
    x = 142,381,856.08/13,378.05
  6. Step 6: Final answer
    x = 10,642.95

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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.