Home / 20,457.23-28,232.35-15,412.55

Finding the Fourth Proportional to 20,457.23, 28,232.35 and 15,412.55

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Solution

The fourth proportional to 20,457.23, 28,232.35 and 15,412.55 is: 21,270.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.23 : 28,232.35 = 15,412.55 : x
  2. Step 2: Convert to fraction form
    20,457.23/28,232.35 = 15,412.55/x
  3. Step 3: Cross multiply
    20,457.23x = 28,232.35 × 15,412.55
  4. Step 4: Simplify right side
    20,457.23x = 435,132,326.30
  5. Step 5: Solve for x
    x = 435,132,326.30/20,457.23
  6. Step 6: Final answer
    x = 21,270.35

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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.