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Finding the Fourth Proportional to 35,496, 48,987.78 and 20,390.76

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Solution

The fourth proportional to 35,496, 48,987.78 and 20,390.76 is: 28,141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,496 : 48,987.78 = 20,390.76 : x
  2. Step 2: Convert to fraction form
    35,496/48,987.78 = 20,390.76/x
  3. Step 3: Cross multiply
    35,496x = 48,987.78 × 20,390.76
  4. Step 4: Simplify right side
    35,496x = 998,898,064.91
  5. Step 5: Solve for x
    x = 998,898,064.91/35,496
  6. Step 6: Final answer
    x = 28,141.14

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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.