Home / 21,267.51-31,913-8,784.63

Finding the Fourth Proportional to 21,267.51, 31,913 and 8,784.63

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Solution

The fourth proportional to 21,267.51, 31,913 and 8,784.63 is: 13,181.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.51 : 31,913 = 8,784.63 : x
  2. Step 2: Convert to fraction form
    21,267.51/31,913 = 8,784.63/x
  3. Step 3: Cross multiply
    21,267.51x = 31,913 × 8,784.63
  4. Step 4: Simplify right side
    21,267.51x = 280,343,897.19
  5. Step 5: Solve for x
    x = 280,343,897.19/21,267.51
  6. Step 6: Final answer
    x = 13,181.79

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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.