Home / 15,678.79-21,635.30-9,304.29

Finding the Fourth Proportional to 15,678.79, 21,635.30 and 9,304.29

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Solution

The fourth proportional to 15,678.79, 21,635.30 and 9,304.29 is: 12,839.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.79 : 21,635.30 = 9,304.29 : x
  2. Step 2: Convert to fraction form
    15,678.79/21,635.30 = 9,304.29/x
  3. Step 3: Cross multiply
    15,678.79x = 21,635.30 × 9,304.29
  4. Step 4: Simplify right side
    15,678.79x = 201,301,128.70
  5. Step 5: Solve for x
    x = 201,301,128.70/15,678.79
  6. Step 6: Final answer
    x = 12,839.08

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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.