Home / 13,689,842.40-18,892,122.48-7,578,139.68

Finding the Fourth Proportional to 13,689,842.40, 18,892,122.48 and 7,578,139.68

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Solution

The fourth proportional to 13,689,842.40, 18,892,122.48 and 7,578,139.68 is: 10,457,910.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689,842.40 : 18,892,122.48 = 7,578,139.68 : x
  2. Step 2: Convert to fraction form
    13,689,842.40/18,892,122.48 = 7,578,139.68/x
  3. Step 3: Cross multiply
    13,689,842.40x = 18,892,122.48 × 7,578,139.68
  4. Step 4: Simplify right side
    13,689,842.40x = 143,167,143,005,108
  5. Step 5: Solve for x
    x = 143,167,143,005,108/13,689,842.40
  6. Step 6: Final answer
    x = 10,457,910.24

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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.