Home / 21,219,412.38-31,806,457.40-12,101,877.72

Finding the Fourth Proportional to 21,219,412.38, 31,806,457.40 and 12,101,877.72

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Solution

The fourth proportional to 21,219,412.38, 31,806,457.40 and 12,101,877.72 is: 18,139,892.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219,412.38 : 31,806,457.40 = 12,101,877.72 : x
  2. Step 2: Convert to fraction form
    21,219,412.38/31,806,457.40 = 12,101,877.72/x
  3. Step 3: Cross multiply
    21,219,412.38x = 31,806,457.40 × 12,101,877.72
  4. Step 4: Simplify right side
    21,219,412.38x = 384,917,858,161,189.12
  5. Step 5: Solve for x
    x = 384,917,858,161,189.12/21,219,412.38
  6. Step 6: Final answer
    x = 18,139,892.44

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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.