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Finding the Fourth Proportional to 30,045.60, 45,165.60 and 21,340.80

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Solution

The fourth proportional to 30,045.60, 45,165.60 and 21,340.80 is: 32,080.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,045.60 : 45,165.60 = 21,340.80 : x
  2. Step 2: Convert to fraction form
    30,045.60/45,165.60 = 21,340.80/x
  3. Step 3: Cross multiply
    30,045.60x = 45,165.60 × 21,340.80
  4. Step 4: Simplify right side
    30,045.60x = 963,870,036.48
  5. Step 5: Solve for x
    x = 963,870,036.48/30,045.60
  6. Step 6: Final answer
    x = 32,080.24

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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.