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Finding the Fourth Proportional to 20,030.40, 30,045.60 and 10,699.20

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Solution

The fourth proportional to 20,030.40, 30,045.60 and 10,699.20 is: 16,048.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,030.40 : 30,045.60 = 10,699.20 : x
  2. Step 2: Convert to fraction form
    20,030.40/30,045.60 = 10,699.20/x
  3. Step 3: Cross multiply
    20,030.40x = 30,045.60 × 10,699.20
  4. Step 4: Simplify right side
    20,030.40x = 321,463,883.52
  5. Step 5: Solve for x
    x = 321,463,883.52/20,030.40
  6. Step 6: Final answer
    x = 16,048.80

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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.