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Finding the Fourth Proportional to 29,649, 40,925.34 and 21,289.80

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Solution

The fourth proportional to 29,649, 40,925.34 and 21,289.80 is: 29,386.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,649 : 40,925.34 = 21,289.80 : x
  2. Step 2: Convert to fraction form
    29,649/40,925.34 = 21,289.80/x
  3. Step 3: Cross multiply
    29,649x = 40,925.34 × 21,289.80
  4. Step 4: Simplify right side
    29,649x = 871,292,303.53
  5. Step 5: Solve for x
    x = 871,292,303.53/29,649
  6. Step 6: Final answer
    x = 29,386.90

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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.