Home / 15,347.81-21,179.75-8,541.72

Finding the Fourth Proportional to 15,347.81, 21,179.75 and 8,541.72

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Solution

The fourth proportional to 15,347.81, 21,179.75 and 8,541.72 is: 11,787.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.81 : 21,179.75 = 8,541.72 : x
  2. Step 2: Convert to fraction form
    15,347.81/21,179.75 = 8,541.72/x
  3. Step 3: Cross multiply
    15,347.81x = 21,179.75 × 8,541.72
  4. Step 4: Simplify right side
    15,347.81x = 180,911,451.46
  5. Step 5: Solve for x
    x = 180,911,451.46/15,347.81
  6. Step 6: Final answer
    x = 11,787.44

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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.