Home / 18,988.80-26,204.64-13,685.28

Finding the Fourth Proportional to 18,988.80, 26,204.64 and 13,685.28

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Solution

The fourth proportional to 18,988.80, 26,204.64 and 13,685.28 is: 18,885.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.80 : 26,204.64 = 13,685.28 : x
  2. Step 2: Convert to fraction form
    18,988.80/26,204.64 = 13,685.28/x
  3. Step 3: Cross multiply
    18,988.80x = 26,204.64 × 13,685.28
  4. Step 4: Simplify right side
    18,988.80x = 358,617,835.70
  5. Step 5: Solve for x
    x = 358,617,835.70/18,988.80
  6. Step 6: Final answer
    x = 18,885.76

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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.