Home / 20,987.07-31,500.05-10,606.11

Finding the Fourth Proportional to 20,987.07, 31,500.05 and 10,606.11

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Solution

The fourth proportional to 20,987.07, 31,500.05 and 10,606.11 is: 15,918.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.07 : 31,500.05 = 10,606.11 : x
  2. Step 2: Convert to fraction form
    20,987.07/31,500.05 = 10,606.11/x
  3. Step 3: Cross multiply
    20,987.07x = 31,500.05 × 10,606.11
  4. Step 4: Simplify right side
    20,987.07x = 334,092,942.27
  5. Step 5: Solve for x
    x = 334,092,942.27/20,987.07
  6. Step 6: Final answer
    x = 15,918.99

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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.