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Finding the Fourth Proportional to 30,577.60, 45,866.40 and 21,246.40

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Solution

The fourth proportional to 30,577.60, 45,866.40 and 21,246.40 is: 31,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,577.60 : 45,866.40 = 21,246.40 : x
  2. Step 2: Convert to fraction form
    30,577.60/45,866.40 = 21,246.40/x
  3. Step 3: Cross multiply
    30,577.60x = 45,866.40 × 21,246.40
  4. Step 4: Simplify right side
    30,577.60x = 974,495,880.96
  5. Step 5: Solve for x
    x = 974,495,880.96/30,577.60
  6. Step 6: Final answer
    x = 31,869.60

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Similar ratio
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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.