Home / 28,455.69-39,272.81-15,881.25

Finding the Fourth Proportional to 28,455.69, 39,272.81 and 15,881.25

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Solution

The fourth proportional to 28,455.69, 39,272.81 and 15,881.25 is: 21,918.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.69 : 39,272.81 = 15,881.25 : x
  2. Step 2: Convert to fraction form
    28,455.69/39,272.81 = 15,881.25/x
  3. Step 3: Cross multiply
    28,455.69x = 39,272.81 × 15,881.25
  4. Step 4: Simplify right side
    28,455.69x = 623,701,353.52
  5. Step 5: Solve for x
    x = 623,701,353.52/28,455.69
  6. Step 6: Final answer
    x = 21,918.34

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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.