Home / 21,768.31-30,043.55-13,275.36

Finding the Fourth Proportional to 21,768.31, 30,043.55 and 13,275.36

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Solution

The fourth proportional to 21,768.31, 30,043.55 and 13,275.36 is: 18,322.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,768.31 : 30,043.55 = 13,275.36 : x
  2. Step 2: Convert to fraction form
    21,768.31/30,043.55 = 13,275.36/x
  3. Step 3: Cross multiply
    21,768.31x = 30,043.55 × 13,275.36
  4. Step 4: Simplify right side
    21,768.31x = 398,838,967.26
  5. Step 5: Solve for x
    x = 398,838,967.26/21,768.31
  6. Step 6: Final answer
    x = 18,322.00

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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.