Home / 21,420.60-32,111.70-19,087.80

Finding the Fourth Proportional to 21,420.60, 32,111.70 and 19,087.80

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Solution

The fourth proportional to 21,420.60, 32,111.70 and 19,087.80 is: 28,614.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.60 : 32,111.70 = 19,087.80 : x
  2. Step 2: Convert to fraction form
    21,420.60/32,111.70 = 19,087.80/x
  3. Step 3: Cross multiply
    21,420.60x = 32,111.70 × 19,087.80
  4. Step 4: Simplify right side
    21,420.60x = 612,941,707.26
  5. Step 5: Solve for x
    x = 612,941,707.26/21,420.60
  6. Step 6: Final answer
    x = 28,614.59

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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.