Home / 15,487.32-21,371.81-8,772.81

Finding the Fourth Proportional to 15,487.32, 21,371.81 and 8,772.81

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Solution

The fourth proportional to 15,487.32, 21,371.81 and 8,772.81 is: 12,106.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.32 : 21,371.81 = 8,772.81 : x
  2. Step 2: Convert to fraction form
    15,487.32/21,371.81 = 8,772.81/x
  3. Step 3: Cross multiply
    15,487.32x = 21,371.81 × 8,772.81
  4. Step 4: Simplify right side
    15,487.32x = 187,490,777.45
  5. Step 5: Solve for x
    x = 187,490,777.45/15,487.32
  6. Step 6: Final answer
    x = 12,106.09

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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.