Home / 20,478.12-28,254.15-11,525.10

Finding the Fourth Proportional to 20,478.12, 28,254.15 and 11,525.10

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Solution

The fourth proportional to 20,478.12, 28,254.15 and 11,525.10 is: 15,901.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.12 : 28,254.15 = 11,525.10 : x
  2. Step 2: Convert to fraction form
    20,478.12/28,254.15 = 11,525.10/x
  3. Step 3: Cross multiply
    20,478.12x = 28,254.15 × 11,525.10
  4. Step 4: Simplify right side
    20,478.12x = 325,631,904.17
  5. Step 5: Solve for x
    x = 325,631,904.17/20,478.12
  6. Step 6: Final answer
    x = 15,901.46

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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.