Home / 21,054.40-31,543.20-17,137.60

Finding the Fourth Proportional to 21,054.40, 31,543.20 and 17,137.60

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Solution

The fourth proportional to 21,054.40, 31,543.20 and 17,137.60 is: 25,675.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.40 : 31,543.20 = 17,137.60 : x
  2. Step 2: Convert to fraction form
    21,054.40/31,543.20 = 17,137.60/x
  3. Step 3: Cross multiply
    21,054.40x = 31,543.20 × 17,137.60
  4. Step 4: Simplify right side
    21,054.40x = 540,574,744.32
  5. Step 5: Solve for x
    x = 540,574,744.32/21,054.40
  6. Step 6: Final answer
    x = 25,675.14

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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.