Home / 20,913-31,368.60-5,330.16

Finding the Fourth Proportional to 20,913, 31,368.60 and 5,330.16

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Solution

The fourth proportional to 20,913, 31,368.60 and 5,330.16 is: 7,995.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913 : 31,368.60 = 5,330.16 : x
  2. Step 2: Convert to fraction form
    20,913/31,368.60 = 5,330.16/x
  3. Step 3: Cross multiply
    20,913x = 31,368.60 × 5,330.16
  4. Step 4: Simplify right side
    20,913x = 167,199,656.98
  5. Step 5: Solve for x
    x = 167,199,656.98/20,913
  6. Step 6: Final answer
    x = 7,995.01

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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.