Home / 13,686,779.43-18,891,962.24-7,889,437.71

Finding the Fourth Proportional to 13,686,779.43, 18,891,962.24 and 7,889,437.71

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Solution

The fourth proportional to 13,686,779.43, 18,891,962.24 and 7,889,437.71 is: 10,889,848.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686,779.43 : 18,891,962.24 = 7,889,437.71 : x
  2. Step 2: Convert to fraction form
    13,686,779.43/18,891,962.24 = 7,889,437.71/x
  3. Step 3: Cross multiply
    13,686,779.43x = 18,891,962.24 × 7,889,437.71
  4. Step 4: Simplify right side
    13,686,779.43x = 149,046,959,272,704.88
  5. Step 5: Solve for x
    x = 149,046,959,272,704.88/13,686,779.43
  6. Step 6: Final answer
    x = 10,889,848.85

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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.