Home / 21,043.60-31,565.40-7,003.60

Finding the Fourth Proportional to 21,043.60, 31,565.40 and 7,003.60

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Solution

The fourth proportional to 21,043.60, 31,565.40 and 7,003.60 is: 10,505.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.60 : 31,565.40 = 7,003.60 : x
  2. Step 2: Convert to fraction form
    21,043.60/31,565.40 = 7,003.60/x
  3. Step 3: Cross multiply
    21,043.60x = 31,565.40 × 7,003.60
  4. Step 4: Simplify right side
    21,043.60x = 221,071,435.44
  5. Step 5: Solve for x
    x = 221,071,435.44/21,043.60
  6. Step 6: Final answer
    x = 10,505.40

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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.