Home / 21,689.85-29,935.41-15,719.34

Finding the Fourth Proportional to 21,689.85, 29,935.41 and 15,719.34

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Solution

The fourth proportional to 21,689.85, 29,935.41 and 15,719.34 is: 21,695.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.85 : 29,935.41 = 15,719.34 : x
  2. Step 2: Convert to fraction form
    21,689.85/29,935.41 = 15,719.34/x
  3. Step 3: Cross multiply
    21,689.85x = 29,935.41 × 15,719.34
  4. Step 4: Simplify right side
    21,689.85x = 470,564,887.83
  5. Step 5: Solve for x
    x = 470,564,887.83/21,689.85
  6. Step 6: Final answer
    x = 21,695.17

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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.