Home / 20,705.60-31,058.40-7,558.40

Finding the Fourth Proportional to 20,705.60, 31,058.40 and 7,558.40

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Solution

The fourth proportional to 20,705.60, 31,058.40 and 7,558.40 is: 11,337.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.60 : 31,058.40 = 7,558.40 : x
  2. Step 2: Convert to fraction form
    20,705.60/31,058.40 = 7,558.40/x
  3. Step 3: Cross multiply
    20,705.60x = 31,058.40 × 7,558.40
  4. Step 4: Simplify right side
    20,705.60x = 234,751,810.56
  5. Step 5: Solve for x
    x = 234,751,810.56/20,705.60
  6. Step 6: Final answer
    x = 11,337.60

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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.