Home / 13,987.42-20,985.54-6,591.58

Finding the Fourth Proportional to 13,987.42, 20,985.54 and 6,591.58

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Solution

The fourth proportional to 13,987.42, 20,985.54 and 6,591.58 is: 9,889.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.42 : 20,985.54 = 6,591.58 : x
  2. Step 2: Convert to fraction form
    13,987.42/20,985.54 = 6,591.58/x
  3. Step 3: Cross multiply
    13,987.42x = 20,985.54 × 6,591.58
  4. Step 4: Simplify right side
    13,987.42x = 138,327,865.75
  5. Step 5: Solve for x
    x = 138,327,865.75/13,987.42
  6. Step 6: Final answer
    x = 9,889.45

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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.