Home / 21,328.98-31,967.53-15,090.79

Finding the Fourth Proportional to 21,328.98, 31,967.53 and 15,090.79

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Solution

The fourth proportional to 21,328.98, 31,967.53 and 15,090.79 is: 22,617.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.98 : 31,967.53 = 15,090.79 : x
  2. Step 2: Convert to fraction form
    21,328.98/31,967.53 = 15,090.79/x
  3. Step 3: Cross multiply
    21,328.98x = 31,967.53 × 15,090.79
  4. Step 4: Simplify right side
    21,328.98x = 482,415,438.79
  5. Step 5: Solve for x
    x = 482,415,438.79/21,328.98
  6. Step 6: Final answer
    x = 22,617.84

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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.