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Finding the Fourth Proportional to 15,133.31, 20,881.71 and 8,419.01

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Solution

The fourth proportional to 15,133.31, 20,881.71 and 8,419.01 is: 11,616.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,133.31 : 20,881.71 = 8,419.01 : x
  2. Step 2: Convert to fraction form
    15,133.31/20,881.71 = 8,419.01/x
  3. Step 3: Cross multiply
    15,133.31x = 20,881.71 × 8,419.01
  4. Step 4: Simplify right side
    15,133.31x = 175,803,377.51
  5. Step 5: Solve for x
    x = 175,803,377.51/15,133.31
  6. Step 6: Final answer
    x = 11,616.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.