Home / 10,128,653.81-13,978,872.90-5,776,742.51

Finding the Fourth Proportional to 10,128,653.81, 13,978,872.90 and 5,776,742.51

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Solution

The fourth proportional to 10,128,653.81, 13,978,872.90 and 5,776,742.51 is: 7,972,663.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128,653.81 : 13,978,872.90 = 5,776,742.51 : x
  2. Step 2: Convert to fraction form
    10,128,653.81/13,978,872.90 = 5,776,742.51/x
  3. Step 3: Cross multiply
    10,128,653.81x = 13,978,872.90 × 5,776,742.51
  4. Step 4: Simplify right side
    10,128,653.81x = 80,752,349,253,422.61
  5. Step 5: Solve for x
    x = 80,752,349,253,422.61/10,128,653.81
  6. Step 6: Final answer
    x = 7,972,663.57

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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.