Home / 21,561.31-29,744.77-15,583.51

Finding the Fourth Proportional to 21,561.31, 29,744.77 and 15,583.51

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Solution

The fourth proportional to 21,561.31, 29,744.77 and 15,583.51 is: 21,498.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.31 : 29,744.77 = 15,583.51 : x
  2. Step 2: Convert to fraction form
    21,561.31/29,744.77 = 15,583.51/x
  3. Step 3: Cross multiply
    21,561.31x = 29,744.77 × 15,583.51
  4. Step 4: Simplify right side
    21,561.31x = 463,527,733.06
  5. Step 5: Solve for x
    x = 463,527,733.06/21,561.31
  6. Step 6: Final answer
    x = 21,498.13

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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.