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Finding the Fourth Proportional to 20,368.99, 30,545.99 and 7,038.60

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Solution

The fourth proportional to 20,368.99, 30,545.99 and 7,038.60 is: 10,555.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.99 : 30,545.99 = 7,038.60 : x
  2. Step 2: Convert to fraction form
    20,368.99/30,545.99 = 7,038.60/x
  3. Step 3: Cross multiply
    20,368.99x = 30,545.99 × 7,038.60
  4. Step 4: Simplify right side
    20,368.99x = 215,001,005.21
  5. Step 5: Solve for x
    x = 215,001,005.21/20,368.99
  6. Step 6: Final answer
    x = 10,555.31

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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.