Home / 15,378.28-21,222.10-8,664.01

Finding the Fourth Proportional to 15,378.28, 21,222.10 and 8,664.01

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Solution

The fourth proportional to 15,378.28, 21,222.10 and 8,664.01 is: 11,956.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.28 : 21,222.10 = 8,664.01 : x
  2. Step 2: Convert to fraction form
    15,378.28/21,222.10 = 8,664.01/x
  3. Step 3: Cross multiply
    15,378.28x = 21,222.10 × 8,664.01
  4. Step 4: Simplify right side
    15,378.28x = 183,868,563.77
  5. Step 5: Solve for x
    x = 183,868,563.77/15,378.28
  6. Step 6: Final answer
    x = 11,956.38

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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.