Home / 21,040.90-31,603.40-13,157.44

Finding the Fourth Proportional to 21,040.90, 31,603.40 and 13,157.44

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Solution

The fourth proportional to 21,040.90, 31,603.40 and 13,157.44 is: 19,762.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.90 : 31,603.40 = 13,157.44 : x
  2. Step 2: Convert to fraction form
    21,040.90/31,603.40 = 13,157.44/x
  3. Step 3: Cross multiply
    21,040.90x = 31,603.40 × 13,157.44
  4. Step 4: Simplify right side
    21,040.90x = 415,819,839.30
  5. Step 5: Solve for x
    x = 415,819,839.30/21,040.90
  6. Step 6: Final answer
    x = 19,762.45

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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.