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Finding the Fourth Proportional to 34,398.81, 47,478.81 and 20,977.47

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Solution

The fourth proportional to 34,398.81, 47,478.81 and 20,977.47 is: 28,954.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,398.81 : 47,478.81 = 20,977.47 : x
  2. Step 2: Convert to fraction form
    34,398.81/47,478.81 = 20,977.47/x
  3. Step 3: Cross multiply
    34,398.81x = 47,478.81 × 20,977.47
  4. Step 4: Simplify right side
    34,398.81x = 995,985,312.41
  5. Step 5: Solve for x
    x = 995,985,312.41/34,398.81
  6. Step 6: Final answer
    x = 28,954.06

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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.