Home / 20,987.40-31,448.70-17,682.60

Finding the Fourth Proportional to 20,987.40, 31,448.70 and 17,682.60

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Solution

The fourth proportional to 20,987.40, 31,448.70 and 17,682.60 is: 26,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.40 : 31,448.70 = 17,682.60 : x
  2. Step 2: Convert to fraction form
    20,987.40/31,448.70 = 17,682.60/x
  3. Step 3: Cross multiply
    20,987.40x = 31,448.70 × 17,682.60
  4. Step 4: Simplify right side
    20,987.40x = 556,094,782.62
  5. Step 5: Solve for x
    x = 556,094,782.62/20,987.40
  6. Step 6: Final answer
    x = 26,496.60

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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.