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Finding the Fourth Proportional to 45,928.60, 68,876.70 and 20,980.60

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Solution

The fourth proportional to 45,928.60, 68,876.70 and 20,980.60 is: 31,463.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,928.60 : 68,876.70 = 20,980.60 : x
  2. Step 2: Convert to fraction form
    45,928.60/68,876.70 = 20,980.60/x
  3. Step 3: Cross multiply
    45,928.60x = 68,876.70 × 20,980.60
  4. Step 4: Simplify right side
    45,928.60x = 1,445,074,492.02
  5. Step 5: Solve for x
    x = 1,445,074,492.02/45,928.60
  6. Step 6: Final answer
    x = 31,463.50

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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.