Home / 30,876.93-42,624.86-20,685.51

Finding the Fourth Proportional to 30,876.93, 42,624.86 and 20,685.51

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Solution

The fourth proportional to 30,876.93, 42,624.86 and 20,685.51 is: 28,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,876.93 : 42,624.86 = 20,685.51 : x
  2. Step 2: Convert to fraction form
    30,876.93/42,624.86 = 20,685.51/x
  3. Step 3: Cross multiply
    30,876.93x = 42,624.86 × 20,685.51
  4. Step 4: Simplify right side
    30,876.93x = 881,716,864.35
  5. Step 5: Solve for x
    x = 881,716,864.35/30,876.93
  6. Step 6: Final answer
    x = 28,555.85

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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.