Home / 20,980.01-28,955.75-12,482.51

Finding the Fourth Proportional to 20,980.01, 28,955.75 and 12,482.51

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Solution

The fourth proportional to 20,980.01, 28,955.75 and 12,482.51 is: 17,227.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.01 : 28,955.75 = 12,482.51 : x
  2. Step 2: Convert to fraction form
    20,980.01/28,955.75 = 12,482.51/x
  3. Step 3: Cross multiply
    20,980.01x = 28,955.75 × 12,482.51
  4. Step 4: Simplify right side
    20,980.01x = 361,440,231.74
  5. Step 5: Solve for x
    x = 361,440,231.74/20,980.01
  6. Step 6: Final answer
    x = 17,227.84

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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.