Home / 21,317.60-31,976.40-12,101.60

Finding the Fourth Proportional to 21,317.60, 31,976.40 and 12,101.60

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Solution

The fourth proportional to 21,317.60, 31,976.40 and 12,101.60 is: 18,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.60 : 31,976.40 = 12,101.60 : x
  2. Step 2: Convert to fraction form
    21,317.60/31,976.40 = 12,101.60/x
  3. Step 3: Cross multiply
    21,317.60x = 31,976.40 × 12,101.60
  4. Step 4: Simplify right side
    21,317.60x = 386,965,602.24
  5. Step 5: Solve for x
    x = 386,965,602.24/21,317.60
  6. Step 6: Final answer
    x = 18,152.40

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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.