Home / 31,020,021.78-42,807,630-17,081,343.66

Finding the Fourth Proportional to 31,020,021.78, 42,807,630 and 17,081,343.66

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Solution

The fourth proportional to 31,020,021.78, 42,807,630 and 17,081,343.66 is: 23,572,254.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,020,021.78 : 42,807,630 = 17,081,343.66 : x
  2. Step 2: Convert to fraction form
    31,020,021.78/42,807,630 = 17,081,343.66/x
  3. Step 3: Cross multiply
    31,020,021.78x = 42,807,630 × 17,081,343.66
  4. Step 4: Simplify right side
    31,020,021.78x = 731,211,839,300,125.75
  5. Step 5: Solve for x
    x = 731,211,839,300,125.75/31,020,021.78
  6. Step 6: Final answer
    x = 23,572,254.22

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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.