Home / 27,995.16-38,629.80-15,420.72

Finding the Fourth Proportional to 27,995.16, 38,629.80 and 15,420.72

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Solution

The fourth proportional to 27,995.16, 38,629.80 and 15,420.72 is: 21,278.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,995.16 : 38,629.80 = 15,420.72 : x
  2. Step 2: Convert to fraction form
    27,995.16/38,629.80 = 15,420.72/x
  3. Step 3: Cross multiply
    27,995.16x = 38,629.80 × 15,420.72
  4. Step 4: Simplify right side
    27,995.16x = 595,699,329.46
  5. Step 5: Solve for x
    x = 595,699,329.46/27,995.16
  6. Step 6: Final answer
    x = 21,278.65

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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.