Home / 15,388,530.60-21,236,012.55-8,419,142.28

Finding the Fourth Proportional to 15,388,530.60, 21,236,012.55 and 8,419,142.28

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Solution

The fourth proportional to 15,388,530.60, 21,236,012.55 and 8,419,142.28 is: 11,618,328.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388,530.60 : 21,236,012.55 = 8,419,142.28 : x
  2. Step 2: Convert to fraction form
    15,388,530.60/21,236,012.55 = 8,419,142.28/x
  3. Step 3: Cross multiply
    15,388,530.60x = 21,236,012.55 × 8,419,142.28
  4. Step 4: Simplify right side
    15,388,530.60x = 178,789,011,118,315.59
  5. Step 5: Solve for x
    x = 178,789,011,118,315.59/15,388,530.60
  6. Step 6: Final answer
    x = 11,618,328.99

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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.