Home / 15,525.68-21,430.26-8,815.77

Finding the Fourth Proportional to 15,525.68, 21,430.26 and 8,815.77

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Solution

The fourth proportional to 15,525.68, 21,430.26 and 8,815.77 is: 12,168.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,525.68 : 21,430.26 = 8,815.77 : x
  2. Step 2: Convert to fraction form
    15,525.68/21,430.26 = 8,815.77/x
  3. Step 3: Cross multiply
    15,525.68x = 21,430.26 × 8,815.77
  4. Step 4: Simplify right side
    15,525.68x = 188,924,243.20
  5. Step 5: Solve for x
    x = 188,924,243.20/15,525.68
  6. Step 6: Final answer
    x = 12,168.50

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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.