Home / 19,921.19-29,881.58-5,130.05

Finding the Fourth Proportional to 19,921.19, 29,881.58 and 5,130.05

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Solution

The fourth proportional to 19,921.19, 29,881.58 and 5,130.05 is: 7,695.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.19 : 29,881.58 = 5,130.05 : x
  2. Step 2: Convert to fraction form
    19,921.19/29,881.58 = 5,130.05/x
  3. Step 3: Cross multiply
    19,921.19x = 29,881.58 × 5,130.05
  4. Step 4: Simplify right side
    19,921.19x = 153,293,824.42
  5. Step 5: Solve for x
    x = 153,293,824.42/19,921.19
  6. Step 6: Final answer
    x = 7,695.02

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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.