Home / 21,459.81-32,148.20-12,071.30

Finding the Fourth Proportional to 21,459.81, 32,148.20 and 12,071.30

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Solution

The fourth proportional to 21,459.81, 32,148.20 and 12,071.30 is: 18,083.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.81 : 32,148.20 = 12,071.30 : x
  2. Step 2: Convert to fraction form
    21,459.81/32,148.20 = 12,071.30/x
  3. Step 3: Cross multiply
    21,459.81x = 32,148.20 × 12,071.30
  4. Step 4: Simplify right side
    21,459.81x = 388,070,566.66
  5. Step 5: Solve for x
    x = 388,070,566.66/21,459.81
  6. Step 6: Final answer
    x = 18,083.60

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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.