Home / 20,405,509.36-28,126,782.32-13,788,031.28

Finding the Fourth Proportional to 20,405,509.36, 28,126,782.32 and 13,788,031.28

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Solution

The fourth proportional to 20,405,509.36, 28,126,782.32 and 13,788,031.28 is: 19,005,306.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405,509.36 : 28,126,782.32 = 13,788,031.28 : x
  2. Step 2: Convert to fraction form
    20,405,509.36/28,126,782.32 = 13,788,031.28/x
  3. Step 3: Cross multiply
    20,405,509.36x = 28,126,782.32 × 13,788,031.28
  4. Step 4: Simplify right side
    20,405,509.36x = 387,812,954,433,910.94
  5. Step 5: Solve for x
    x = 387,812,954,433,910.94/20,405,509.36
  6. Step 6: Final answer
    x = 19,005,306.24

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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.