Home / 21,770.60-30,000.42-15,465.32

Finding the Fourth Proportional to 21,770.60, 30,000.42 and 15,465.32

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Solution

The fourth proportional to 21,770.60, 30,000.42 and 15,465.32 is: 21,311.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.60 : 30,000.42 = 15,465.32 : x
  2. Step 2: Convert to fraction form
    21,770.60/30,000.42 = 15,465.32/x
  3. Step 3: Cross multiply
    21,770.60x = 30,000.42 × 15,465.32
  4. Step 4: Simplify right side
    21,770.60x = 463,966,095.43
  5. Step 5: Solve for x
    x = 463,966,095.43/21,770.60
  6. Step 6: Final answer
    x = 21,311.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.