Home / 21,351.87-31,809.04-21,118.59

Finding the Fourth Proportional to 21,351.87, 31,809.04 and 21,118.59

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Solution

The fourth proportional to 21,351.87, 31,809.04 and 21,118.59 is: 31,461.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.87 : 31,809.04 = 21,118.59 : x
  2. Step 2: Convert to fraction form
    21,351.87/31,809.04 = 21,118.59/x
  3. Step 3: Cross multiply
    21,351.87x = 31,809.04 × 21,118.59
  4. Step 4: Simplify right side
    21,351.87x = 671,762,021.26
  5. Step 5: Solve for x
    x = 671,762,021.26/21,351.87
  6. Step 6: Final answer
    x = 31,461.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.