Home / 20,897.51-31,345.16-6,855.68

Finding the Fourth Proportional to 20,897.51, 31,345.16 and 6,855.68

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Solution

The fourth proportional to 20,897.51, 31,345.16 and 6,855.68 is: 10,283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.51 : 31,345.16 = 6,855.68 : x
  2. Step 2: Convert to fraction form
    20,897.51/31,345.16 = 6,855.68/x
  3. Step 3: Cross multiply
    20,897.51x = 31,345.16 × 6,855.68
  4. Step 4: Simplify right side
    20,897.51x = 214,892,430.59
  5. Step 5: Solve for x
    x = 214,892,430.59/20,897.51
  6. Step 6: Final answer
    x = 10,283.16

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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.