Home / 15,680.40-21,638.30-8,606.99

Finding the Fourth Proportional to 15,680.40, 21,638.30 and 8,606.99

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Solution

The fourth proportional to 15,680.40, 21,638.30 and 8,606.99 is: 11,877.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.40 : 21,638.30 = 8,606.99 : x
  2. Step 2: Convert to fraction form
    15,680.40/21,638.30 = 8,606.99/x
  3. Step 3: Cross multiply
    15,680.40x = 21,638.30 × 8,606.99
  4. Step 4: Simplify right side
    15,680.40x = 186,240,480.49
  5. Step 5: Solve for x
    x = 186,240,480.49/15,680.40
  6. Step 6: Final answer
    x = 11,877.28

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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.