Home / 13,089.79-18,063.93-7,121.53

Finding the Fourth Proportional to 13,089.79, 18,063.93 and 7,121.53

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Solution

The fourth proportional to 13,089.79, 18,063.93 and 7,121.53 is: 9,827.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.79 : 18,063.93 = 7,121.53 : x
  2. Step 2: Convert to fraction form
    13,089.79/18,063.93 = 7,121.53/x
  3. Step 3: Cross multiply
    13,089.79x = 18,063.93 × 7,121.53
  4. Step 4: Simplify right side
    13,089.79x = 128,642,819.41
  5. Step 5: Solve for x
    x = 128,642,819.41/13,089.79
  6. Step 6: Final answer
    x = 9,827.72

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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.