Home / 21,216.24-29,278.58-13,263.15

Finding the Fourth Proportional to 21,216.24, 29,278.58 and 13,263.15

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Solution

The fourth proportional to 21,216.24, 29,278.58 and 13,263.15 is: 18,303.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.24 : 29,278.58 = 13,263.15 : x
  2. Step 2: Convert to fraction form
    21,216.24/29,278.58 = 13,263.15/x
  3. Step 3: Cross multiply
    21,216.24x = 29,278.58 × 13,263.15
  4. Step 4: Simplify right side
    21,216.24x = 388,326,132.01
  5. Step 5: Solve for x
    x = 388,326,132.01/21,216.24
  6. Step 6: Final answer
    x = 18,303.25

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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.