Home / 15,857.35-21,862.40-13,643.01

Finding the Fourth Proportional to 15,857.35, 21,862.40 and 13,643.01

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Solution

The fourth proportional to 15,857.35, 21,862.40 and 13,643.01 is: 18,809.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.35 : 21,862.40 = 13,643.01 : x
  2. Step 2: Convert to fraction form
    15,857.35/21,862.40 = 13,643.01/x
  3. Step 3: Cross multiply
    15,857.35x = 21,862.40 × 13,643.01
  4. Step 4: Simplify right side
    15,857.35x = 298,268,873.61
  5. Step 5: Solve for x
    x = 298,268,873.61/15,857.35
  6. Step 6: Final answer
    x = 18,809.51

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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.