Home / 28,030.96-38,680.88-15,455.68

Finding the Fourth Proportional to 28,030.96, 38,680.88 and 15,455.68

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Solution

The fourth proportional to 28,030.96, 38,680.88 and 15,455.68 is: 21,327.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,030.96 : 38,680.88 = 15,455.68 : x
  2. Step 2: Convert to fraction form
    28,030.96/38,680.88 = 15,455.68/x
  3. Step 3: Cross multiply
    28,030.96x = 38,680.88 × 15,455.68
  4. Step 4: Simplify right side
    28,030.96x = 597,839,303.40
  5. Step 5: Solve for x
    x = 597,839,303.40/28,030.96
  6. Step 6: Final answer
    x = 21,327.82

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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.