Home / 21,281.84-29,373.38-12,784.36

Finding the Fourth Proportional to 21,281.84, 29,373.38 and 12,784.36

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Solution

The fourth proportional to 21,281.84, 29,373.38 and 12,784.36 is: 17,645.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.84 : 29,373.38 = 12,784.36 : x
  2. Step 2: Convert to fraction form
    21,281.84/29,373.38 = 12,784.36/x
  3. Step 3: Cross multiply
    21,281.84x = 29,373.38 × 12,784.36
  4. Step 4: Simplify right side
    21,281.84x = 375,519,864.34
  5. Step 5: Solve for x
    x = 375,519,864.34/21,281.84
  6. Step 6: Final answer
    x = 17,645.08

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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.