Home / 15,705.90-21,674.04-8,535.78

Finding the Fourth Proportional to 15,705.90, 21,674.04 and 8,535.78

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Solution

The fourth proportional to 15,705.90, 21,674.04 and 8,535.78 is: 11,779.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.90 : 21,674.04 = 8,535.78 : x
  2. Step 2: Convert to fraction form
    15,705.90/21,674.04 = 8,535.78/x
  3. Step 3: Cross multiply
    15,705.90x = 21,674.04 × 8,535.78
  4. Step 4: Simplify right side
    15,705.90x = 185,004,837.15
  5. Step 5: Solve for x
    x = 185,004,837.15/15,705.90
  6. Step 6: Final answer
    x = 11,779.32

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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.