Home / 21,041.60-31,536.80-9,342.40

Finding the Fourth Proportional to 21,041.60, 31,536.80 and 9,342.40

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Solution

The fourth proportional to 21,041.60, 31,536.80 and 9,342.40 is: 14,002.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.60 : 31,536.80 = 9,342.40 : x
  2. Step 2: Convert to fraction form
    21,041.60/31,536.80 = 9,342.40/x
  3. Step 3: Cross multiply
    21,041.60x = 31,536.80 × 9,342.40
  4. Step 4: Simplify right side
    21,041.60x = 294,629,400.32
  5. Step 5: Solve for x
    x = 294,629,400.32/21,041.60
  6. Step 6: Final answer
    x = 14,002.23

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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.