Home / 14,120.90-21,188.16-9,987.46

Finding the Fourth Proportional to 14,120.90, 21,188.16 and 9,987.46

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Solution

The fourth proportional to 14,120.90, 21,188.16 and 9,987.46 is: 14,986.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,120.90 : 21,188.16 = 9,987.46 : x
  2. Step 2: Convert to fraction form
    14,120.90/21,188.16 = 9,987.46/x
  3. Step 3: Cross multiply
    14,120.90x = 21,188.16 × 9,987.46
  4. Step 4: Simplify right side
    14,120.90x = 211,615,900.47
  5. Step 5: Solve for x
    x = 211,615,900.47/14,120.90
  6. Step 6: Final answer
    x = 14,986.01

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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.