Home / 21,118,979.82-31,678,586.37-7,655,457.90

Finding the Fourth Proportional to 21,118,979.82, 31,678,586.37 and 7,655,457.90

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Solution

The fourth proportional to 21,118,979.82, 31,678,586.37 and 7,655,457.90 is: 11,483,229.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118,979.82 : 31,678,586.37 = 7,655,457.90 : x
  2. Step 2: Convert to fraction form
    21,118,979.82/31,678,586.37 = 7,655,457.90/x
  3. Step 3: Cross multiply
    21,118,979.82x = 31,678,586.37 × 7,655,457.90
  4. Step 4: Simplify right side
    21,118,979.82x = 242,514,084,287,048.84
  5. Step 5: Solve for x
    x = 242,514,084,287,048.84/21,118,979.82
  6. Step 6: Final answer
    x = 11,483,229.13

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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.