Home / 21,017.10-28,984.44-13,931.22

Finding the Fourth Proportional to 21,017.10, 28,984.44 and 13,931.22

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Solution

The fourth proportional to 21,017.10, 28,984.44 and 13,931.22 is: 19,212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.10 : 28,984.44 = 13,931.22 : x
  2. Step 2: Convert to fraction form
    21,017.10/28,984.44 = 13,931.22/x
  3. Step 3: Cross multiply
    21,017.10x = 28,984.44 × 13,931.22
  4. Step 4: Simplify right side
    21,017.10x = 403,788,610.22
  5. Step 5: Solve for x
    x = 403,788,610.22/21,017.10
  6. Step 6: Final answer
    x = 19,212.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.