Home / 28,122.78-38,809.02-15,376.01

Finding the Fourth Proportional to 28,122.78, 38,809.02 and 15,376.01

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Solution

The fourth proportional to 28,122.78, 38,809.02 and 15,376.01 is: 21,218.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.78 : 38,809.02 = 15,376.01 : x
  2. Step 2: Convert to fraction form
    28,122.78/38,809.02 = 15,376.01/x
  3. Step 3: Cross multiply
    28,122.78x = 38,809.02 × 15,376.01
  4. Step 4: Simplify right side
    28,122.78x = 596,727,976.63
  5. Step 5: Solve for x
    x = 596,727,976.63/28,122.78
  6. Step 6: Final answer
    x = 21,218.67

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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.