Home / 28,275.39-39,021.80-15,700.23

Finding the Fourth Proportional to 28,275.39, 39,021.80 and 15,700.23

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Solution

The fourth proportional to 28,275.39, 39,021.80 and 15,700.23 is: 21,667.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,275.39 : 39,021.80 = 15,700.23 : x
  2. Step 2: Convert to fraction form
    28,275.39/39,021.80 = 15,700.23/x
  3. Step 3: Cross multiply
    28,275.39x = 39,021.80 × 15,700.23
  4. Step 4: Simplify right side
    28,275.39x = 612,651,156.51
  5. Step 5: Solve for x
    x = 612,651,156.51/28,275.39
  6. Step 6: Final answer
    x = 21,667.29

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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.