Home / 26,612.80-39,893.60-20,686.40

Finding the Fourth Proportional to 26,612.80, 39,893.60 and 20,686.40

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Solution

The fourth proportional to 26,612.80, 39,893.60 and 20,686.40 is: 31,009.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,612.80 : 39,893.60 = 20,686.40 : x
  2. Step 2: Convert to fraction form
    26,612.80/39,893.60 = 20,686.40/x
  3. Step 3: Cross multiply
    26,612.80x = 39,893.60 × 20,686.40
  4. Step 4: Simplify right side
    26,612.80x = 825,254,967.04
  5. Step 5: Solve for x
    x = 825,254,967.04/26,612.80
  6. Step 6: Final answer
    x = 31,009.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.