Home / 15,305,406.90-21,121,461.78-8,429,888.76

Finding the Fourth Proportional to 15,305,406.90, 21,121,461.78 and 8,429,888.76

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Solution

The fourth proportional to 15,305,406.90, 21,121,461.78 and 8,429,888.76 is: 11,633,246.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,305,406.90 : 21,121,461.78 = 8,429,888.76 : x
  2. Step 2: Convert to fraction form
    15,305,406.90/21,121,461.78 = 8,429,888.76/x
  3. Step 3: Cross multiply
    15,305,406.90x = 21,121,461.78 × 8,429,888.76
  4. Step 4: Simplify right side
    15,305,406.90x = 178,051,573,253,991.59
  5. Step 5: Solve for x
    x = 178,051,573,253,991.59/15,305,406.90
  6. Step 6: Final answer
    x = 11,633,246.63

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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.