Home / 21,129.04-31,698.42-7,090.93

Finding the Fourth Proportional to 21,129.04, 31,698.42 and 7,090.93

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Solution

The fourth proportional to 21,129.04, 31,698.42 and 7,090.93 is: 10,638.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.04 : 31,698.42 = 7,090.93 : x
  2. Step 2: Convert to fraction form
    21,129.04/31,698.42 = 7,090.93/x
  3. Step 3: Cross multiply
    21,129.04x = 31,698.42 × 7,090.93
  4. Step 4: Simplify right side
    21,129.04x = 224,771,228.84
  5. Step 5: Solve for x
    x = 224,771,228.84/21,129.04
  6. Step 6: Final answer
    x = 10,638.02

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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.