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Finding the Fourth Proportional to 29,970.80, 45,004.80 and 20,153.60

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Solution

The fourth proportional to 29,970.80, 45,004.80 and 20,153.60 is: 30,263.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,970.80 : 45,004.80 = 20,153.60 : x
  2. Step 2: Convert to fraction form
    29,970.80/45,004.80 = 20,153.60/x
  3. Step 3: Cross multiply
    29,970.80x = 45,004.80 × 20,153.60
  4. Step 4: Simplify right side
    29,970.80x = 907,008,737.28
  5. Step 5: Solve for x
    x = 907,008,737.28/29,970.80
  6. Step 6: Final answer
    x = 30,263.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.