Home / 20,673.48-28,530-12,720.36

Finding the Fourth Proportional to 20,673.48, 28,530 and 12,720.36

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Solution

The fourth proportional to 20,673.48, 28,530 and 12,720.36 is: 17,554.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.48 : 28,530 = 12,720.36 : x
  2. Step 2: Convert to fraction form
    20,673.48/28,530 = 12,720.36/x
  3. Step 3: Cross multiply
    20,673.48x = 28,530 × 12,720.36
  4. Step 4: Simplify right side
    20,673.48x = 362,911,870.80
  5. Step 5: Solve for x
    x = 362,911,870.80/20,673.48
  6. Step 6: Final answer
    x = 17,554.46

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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.