Home / 20,280.48-30,421.76-6,430.56

Finding the Fourth Proportional to 20,280.48, 30,421.76 and 6,430.56

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Solution

The fourth proportional to 20,280.48, 30,421.76 and 6,430.56 is: 9,646.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.48 : 30,421.76 = 6,430.56 : x
  2. Step 2: Convert to fraction form
    20,280.48/30,421.76 = 6,430.56/x
  3. Step 3: Cross multiply
    20,280.48x = 30,421.76 × 6,430.56
  4. Step 4: Simplify right side
    20,280.48x = 195,628,952.99
  5. Step 5: Solve for x
    x = 195,628,952.99/20,280.48
  6. Step 6: Final answer
    x = 9,646.17

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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.