Home / 20,762.78-28,643.91-14,478.80

Finding the Fourth Proportional to 20,762.78, 28,643.91 and 14,478.80

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Solution

The fourth proportional to 20,762.78, 28,643.91 and 14,478.80 is: 19,974.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.78 : 28,643.91 = 14,478.80 : x
  2. Step 2: Convert to fraction form
    20,762.78/28,643.91 = 14,478.80/x
  3. Step 3: Cross multiply
    20,762.78x = 28,643.91 × 14,478.80
  4. Step 4: Simplify right side
    20,762.78x = 414,729,444.11
  5. Step 5: Solve for x
    x = 414,729,444.11/20,762.78
  6. Step 6: Final answer
    x = 19,974.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.