Home / 21,383.68-29,511.52-12,430.40

Finding the Fourth Proportional to 21,383.68, 29,511.52 and 12,430.40

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Solution

The fourth proportional to 21,383.68, 29,511.52 and 12,430.40 is: 17,155.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,383.68 : 29,511.52 = 12,430.40 : x
  2. Step 2: Convert to fraction form
    21,383.68/29,511.52 = 12,430.40/x
  3. Step 3: Cross multiply
    21,383.68x = 29,511.52 × 12,430.40
  4. Step 4: Simplify right side
    21,383.68x = 366,839,998.21
  5. Step 5: Solve for x
    x = 366,839,998.21/21,383.68
  6. Step 6: Final answer
    x = 17,155.14

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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.