Home / 21,018.91-28,989.68-13,465.94

Finding the Fourth Proportional to 21,018.91, 28,989.68 and 13,465.94

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Solution

The fourth proportional to 21,018.91, 28,989.68 and 13,465.94 is: 18,572.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.91 : 28,989.68 = 13,465.94 : x
  2. Step 2: Convert to fraction form
    21,018.91/28,989.68 = 13,465.94/x
  3. Step 3: Cross multiply
    21,018.91x = 28,989.68 × 13,465.94
  4. Step 4: Simplify right side
    21,018.91x = 390,373,154.97
  5. Step 5: Solve for x
    x = 390,373,154.97/21,018.91
  6. Step 6: Final answer
    x = 18,572.48

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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.