Home / 21,851.64-30,160.08-13,356.72

Finding the Fourth Proportional to 21,851.64, 30,160.08 and 13,356.72

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Solution

The fourth proportional to 21,851.64, 30,160.08 and 13,356.72 is: 18,435.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.64 : 30,160.08 = 13,356.72 : x
  2. Step 2: Convert to fraction form
    21,851.64/30,160.08 = 13,356.72/x
  3. Step 3: Cross multiply
    21,851.64x = 30,160.08 × 13,356.72
  4. Step 4: Simplify right side
    21,851.64x = 402,839,743.74
  5. Step 5: Solve for x
    x = 402,839,743.74/21,851.64
  6. Step 6: Final answer
    x = 18,435.22

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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.