Home / 13,987.08-20,962.80-7,416.36

Finding the Fourth Proportional to 13,987.08, 20,962.80 and 7,416.36

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Solution

The fourth proportional to 13,987.08, 20,962.80 and 7,416.36 is: 11,115.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.08 : 20,962.80 = 7,416.36 : x
  2. Step 2: Convert to fraction form
    13,987.08/20,962.80 = 7,416.36/x
  3. Step 3: Cross multiply
    13,987.08x = 20,962.80 × 7,416.36
  4. Step 4: Simplify right side
    13,987.08x = 155,467,671.41
  5. Step 5: Solve for x
    x = 155,467,671.41/13,987.08
  6. Step 6: Final answer
    x = 11,115.09

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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.