Home / 22,421.04-30,939.36-12,987.84

Finding the Fourth Proportional to 22,421.04, 30,939.36 and 12,987.84

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Solution

The fourth proportional to 22,421.04, 30,939.36 and 12,987.84 is: 17,922.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,421.04 : 30,939.36 = 12,987.84 : x
  2. Step 2: Convert to fraction form
    22,421.04/30,939.36 = 12,987.84/x
  3. Step 3: Cross multiply
    22,421.04x = 30,939.36 × 12,987.84
  4. Step 4: Simplify right side
    22,421.04x = 401,835,457.38
  5. Step 5: Solve for x
    x = 401,835,457.38/22,421.04
  6. Step 6: Final answer
    x = 17,922.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.