Home / 28,270.07-39,017.73-21,135.79

Finding the Fourth Proportional to 28,270.07, 39,017.73 and 21,135.79

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Solution

The fourth proportional to 28,270.07, 39,017.73 and 21,135.79 is: 29,171.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,270.07 : 39,017.73 = 21,135.79 : x
  2. Step 2: Convert to fraction form
    28,270.07/39,017.73 = 21,135.79/x
  3. Step 3: Cross multiply
    28,270.07x = 39,017.73 × 21,135.79
  4. Step 4: Simplify right side
    28,270.07x = 824,670,547.56
  5. Step 5: Solve for x
    x = 824,670,547.56/28,270.07
  6. Step 6: Final answer
    x = 29,171.15

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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.