Home / 20,657.10-30,985.65-10,815.60

Finding the Fourth Proportional to 20,657.10, 30,985.65 and 10,815.60

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Solution

The fourth proportional to 20,657.10, 30,985.65 and 10,815.60 is: 16,223.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.10 : 30,985.65 = 10,815.60 : x
  2. Step 2: Convert to fraction form
    20,657.10/30,985.65 = 10,815.60/x
  3. Step 3: Cross multiply
    20,657.10x = 30,985.65 × 10,815.60
  4. Step 4: Simplify right side
    20,657.10x = 335,128,396.14
  5. Step 5: Solve for x
    x = 335,128,396.14/20,657.10
  6. Step 6: Final answer
    x = 16,223.40

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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.