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Finding the Fourth Proportional to 15,810.99, 21,820.01 and 9,097.64

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Solution

The fourth proportional to 15,810.99, 21,820.01 and 9,097.64 is: 12,555.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.99 : 21,820.01 = 9,097.64 : x
  2. Step 2: Convert to fraction form
    15,810.99/21,820.01 = 9,097.64/x
  3. Step 3: Cross multiply
    15,810.99x = 21,820.01 × 9,097.64
  4. Step 4: Simplify right side
    15,810.99x = 198,510,595.78
  5. Step 5: Solve for x
    x = 198,510,595.78/15,810.99
  6. Step 6: Final answer
    x = 12,555.23

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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.