Home / 28,720.67-39,629.69-15,972.18

Finding the Fourth Proportional to 28,720.67, 39,629.69 and 15,972.18

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Solution

The fourth proportional to 28,720.67, 39,629.69 and 15,972.18 is: 22,038.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.67 : 39,629.69 = 15,972.18 : x
  2. Step 2: Convert to fraction form
    28,720.67/39,629.69 = 15,972.18/x
  3. Step 3: Cross multiply
    28,720.67x = 39,629.69 × 15,972.18
  4. Step 4: Simplify right side
    28,720.67x = 632,972,462.16
  5. Step 5: Solve for x
    x = 632,972,462.16/28,720.67
  6. Step 6: Final answer
    x = 22,038.92

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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.