Home / 21,459.39-32,190.53-7,420.79

Finding the Fourth Proportional to 21,459.39, 32,190.53 and 7,420.79

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Solution

The fourth proportional to 21,459.39, 32,190.53 and 7,420.79 is: 11,131.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.39 : 32,190.53 = 7,420.79 : x
  2. Step 2: Convert to fraction form
    21,459.39/32,190.53 = 7,420.79/x
  3. Step 3: Cross multiply
    21,459.39x = 32,190.53 × 7,420.79
  4. Step 4: Simplify right side
    21,459.39x = 238,878,965.06
  5. Step 5: Solve for x
    x = 238,878,965.06/21,459.39
  6. Step 6: Final answer
    x = 11,131.68

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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.