Home / 20,840.64-28,760.40-11,410.08

Finding the Fourth Proportional to 20,840.64, 28,760.40 and 11,410.08

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Solution

The fourth proportional to 20,840.64, 28,760.40 and 11,410.08 is: 15,746.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.64 : 28,760.40 = 11,410.08 : x
  2. Step 2: Convert to fraction form
    20,840.64/28,760.40 = 11,410.08/x
  3. Step 3: Cross multiply
    20,840.64x = 28,760.40 × 11,410.08
  4. Step 4: Simplify right side
    20,840.64x = 328,158,464.83
  5. Step 5: Solve for x
    x = 328,158,464.83/20,840.64
  6. Step 6: Final answer
    x = 15,746.08

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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.