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Finding the Fourth Proportional to 28,086.48, 38,756.04 and 15,510.48

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Solution

The fourth proportional to 28,086.48, 38,756.04 and 15,510.48 is: 21,402.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,086.48 : 38,756.04 = 15,510.48 : x
  2. Step 2: Convert to fraction form
    28,086.48/38,756.04 = 15,510.48/x
  3. Step 3: Cross multiply
    28,086.48x = 38,756.04 × 15,510.48
  4. Step 4: Simplify right side
    28,086.48x = 601,124,783.30
  5. Step 5: Solve for x
    x = 601,124,783.30/28,086.48
  6. Step 6: Final answer
    x = 21,402.64

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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.