Home / 13,539.89-18,685.38-7,571.95

Finding the Fourth Proportional to 13,539.89, 18,685.38 and 7,571.95

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Solution

The fourth proportional to 13,539.89, 18,685.38 and 7,571.95 is: 10,449.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.89 : 18,685.38 = 7,571.95 : x
  2. Step 2: Convert to fraction form
    13,539.89/18,685.38 = 7,571.95/x
  3. Step 3: Cross multiply
    13,539.89x = 18,685.38 × 7,571.95
  4. Step 4: Simplify right side
    13,539.89x = 141,484,744.77
  5. Step 5: Solve for x
    x = 141,484,744.77/13,539.89
  6. Step 6: Final answer
    x = 10,449.47

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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.