Home / 13,089.78-18,063.60-7,121.46

Finding the Fourth Proportional to 13,089.78, 18,063.60 and 7,121.46

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Solution

The fourth proportional to 13,089.78, 18,063.60 and 7,121.46 is: 9,827.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.78 : 18,063.60 = 7,121.46 : x
  2. Step 2: Convert to fraction form
    13,089.78/18,063.60 = 7,121.46/x
  3. Step 3: Cross multiply
    13,089.78x = 18,063.60 × 7,121.46
  4. Step 4: Simplify right side
    13,089.78x = 128,639,204.86
  5. Step 5: Solve for x
    x = 128,639,204.86/13,089.78
  6. Step 6: Final answer
    x = 9,827.45

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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.