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Finding the Fourth Proportional to 19,851.58, 27,393.51 and 10,899.01

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Solution

The fourth proportional to 19,851.58, 27,393.51 and 10,899.01 is: 15,039.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,851.58 : 27,393.51 = 10,899.01 : x
  2. Step 2: Convert to fraction form
    19,851.58/27,393.51 = 10,899.01/x
  3. Step 3: Cross multiply
    19,851.58x = 27,393.51 × 10,899.01
  4. Step 4: Simplify right side
    19,851.58x = 298,562,139.43
  5. Step 5: Solve for x
    x = 298,562,139.43/19,851.58
  6. Step 6: Final answer
    x = 15,039.72

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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.