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Finding the Fourth Proportional to 18,398.64, 25,389.22 and 10,440.68

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Solution

The fourth proportional to 18,398.64, 25,389.22 and 10,440.68 is: 14,407.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.64 : 25,389.22 = 10,440.68 : x
  2. Step 2: Convert to fraction form
    18,398.64/25,389.22 = 10,440.68/x
  3. Step 3: Cross multiply
    18,398.64x = 25,389.22 × 10,440.68
  4. Step 4: Simplify right side
    18,398.64x = 265,080,721.47
  5. Step 5: Solve for x
    x = 265,080,721.47/18,398.64
  6. Step 6: Final answer
    x = 14,407.63

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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.