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Finding the Fourth Proportional to 55,987.40, 83,981.10 and 18,537.40

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Solution

The fourth proportional to 55,987.40, 83,981.10 and 18,537.40 is: 27,806.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,987.40 : 83,981.10 = 18,537.40 : x
  2. Step 2: Convert to fraction form
    55,987.40/83,981.10 = 18,537.40/x
  3. Step 3: Cross multiply
    55,987.40x = 83,981.10 × 18,537.40
  4. Step 4: Simplify right side
    55,987.40x = 1,556,791,243.14
  5. Step 5: Solve for x
    x = 1,556,791,243.14/55,987.40
  6. Step 6: Final answer
    x = 27,806.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.