Home / 28,161.28-38,878.74-21,030.51

Finding the Fourth Proportional to 28,161.28, 38,878.74 and 21,030.51

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Solution

The fourth proportional to 28,161.28, 38,878.74 and 21,030.51 is: 29,034.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,161.28 : 38,878.74 = 21,030.51 : x
  2. Step 2: Convert to fraction form
    28,161.28/38,878.74 = 21,030.51/x
  3. Step 3: Cross multiply
    28,161.28x = 38,878.74 × 21,030.51
  4. Step 4: Simplify right side
    28,161.28x = 817,639,625.20
  5. Step 5: Solve for x
    x = 817,639,625.20/28,161.28
  6. Step 6: Final answer
    x = 29,034.18

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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.