Home / 15,911.51-21,971.18-13,272.76

Finding the Fourth Proportional to 15,911.51, 21,971.18 and 13,272.76

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Solution

The fourth proportional to 15,911.51, 21,971.18 and 13,272.76 is: 18,327.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.51 : 21,971.18 = 13,272.76 : x
  2. Step 2: Convert to fraction form
    15,911.51/21,971.18 = 13,272.76/x
  3. Step 3: Cross multiply
    15,911.51x = 21,971.18 × 13,272.76
  4. Step 4: Simplify right side
    15,911.51x = 291,618,022.84
  5. Step 5: Solve for x
    x = 291,618,022.84/15,911.51
  6. Step 6: Final answer
    x = 18,327.49

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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.