Home / 21,005,610.40-31,509,400.74-10,210,042.72

Finding the Fourth Proportional to 21,005,610.40, 31,509,400.74 and 10,210,042.72

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Solution

The fourth proportional to 21,005,610.40, 31,509,400.74 and 10,210,042.72 is: 15,315,542.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,610.40 : 31,509,400.74 = 10,210,042.72 : x
  2. Step 2: Convert to fraction form
    21,005,610.40/31,509,400.74 = 10,210,042.72/x
  3. Step 3: Cross multiply
    21,005,610.40x = 31,509,400.74 × 10,210,042.72
  4. Step 4: Simplify right side
    21,005,610.40x = 321,712,327,636,999.62
  5. Step 5: Solve for x
    x = 321,712,327,636,999.62/21,005,610.40
  6. Step 6: Final answer
    x = 15,315,542.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.