Home / 28,470.66-42,705.06-12,888.30

Finding the Fourth Proportional to 28,470.66, 42,705.06 and 12,888.30

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Solution

The fourth proportional to 28,470.66, 42,705.06 and 12,888.30 is: 19,332.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.66 : 42,705.06 = 12,888.30 : x
  2. Step 2: Convert to fraction form
    28,470.66/42,705.06 = 12,888.30/x
  3. Step 3: Cross multiply
    28,470.66x = 42,705.06 × 12,888.30
  4. Step 4: Simplify right side
    28,470.66x = 550,395,624.80
  5. Step 5: Solve for x
    x = 550,395,624.80/28,470.66
  6. Step 6: Final answer
    x = 19,332.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.