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Finding the Fourth Proportional to 21,705.59, 32,560.99 and 7,662.74

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Solution

The fourth proportional to 21,705.59, 32,560.99 and 7,662.74 is: 11,495.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.59 : 32,560.99 = 7,662.74 : x
  2. Step 2: Convert to fraction form
    21,705.59/32,560.99 = 7,662.74/x
  3. Step 3: Cross multiply
    21,705.59x = 32,560.99 × 7,662.74
  4. Step 4: Simplify right side
    21,705.59x = 249,506,218.55
  5. Step 5: Solve for x
    x = 249,506,218.55/21,705.59
  6. Step 6: Final answer
    x = 11,495.02

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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.