Home / 21,307.12-29,417.52-13,756.84

Finding the Fourth Proportional to 21,307.12, 29,417.52 and 13,756.84

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Solution

The fourth proportional to 21,307.12, 29,417.52 and 13,756.84 is: 18,993.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.12 : 29,417.52 = 13,756.84 : x
  2. Step 2: Convert to fraction form
    21,307.12/29,417.52 = 13,756.84/x
  3. Step 3: Cross multiply
    21,307.12x = 29,417.52 × 13,756.84
  4. Step 4: Simplify right side
    21,307.12x = 404,692,115.84
  5. Step 5: Solve for x
    x = 404,692,115.84/21,307.12
  6. Step 6: Final answer
    x = 18,993.28

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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.