Home / 18,988.64-26,217.28-12,290.48

Finding the Fourth Proportional to 18,988.64, 26,217.28 and 12,290.48

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Solution

The fourth proportional to 18,988.64, 26,217.28 and 12,290.48 is: 16,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.64 : 26,217.28 = 12,290.48 : x
  2. Step 2: Convert to fraction form
    18,988.64/26,217.28 = 12,290.48/x
  3. Step 3: Cross multiply
    18,988.64x = 26,217.28 × 12,290.48
  4. Step 4: Simplify right side
    18,988.64x = 322,222,955.49
  5. Step 5: Solve for x
    x = 322,222,955.49/18,988.64
  6. Step 6: Final answer
    x = 16,969.25

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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.