Home / 13,287.36-18,342.36-8,981.40

Finding the Fourth Proportional to 13,287.36, 18,342.36 and 8,981.40

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Solution

The fourth proportional to 13,287.36, 18,342.36 and 8,981.40 is: 12,398.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.36 : 18,342.36 = 8,981.40 : x
  2. Step 2: Convert to fraction form
    13,287.36/18,342.36 = 8,981.40/x
  3. Step 3: Cross multiply
    13,287.36x = 18,342.36 × 8,981.40
  4. Step 4: Simplify right side
    13,287.36x = 164,740,072.10
  5. Step 5: Solve for x
    x = 164,740,072.10/13,287.36
  6. Step 6: Final answer
    x = 12,398.25

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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.