Home / 30,981.84-42,733.32-20,368.08

Finding the Fourth Proportional to 30,981.84, 42,733.32 and 20,368.08

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Solution

The fourth proportional to 30,981.84, 42,733.32 and 20,368.08 is: 28,093.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.84 : 42,733.32 = 20,368.08 : x
  2. Step 2: Convert to fraction form
    30,981.84/42,733.32 = 20,368.08/x
  3. Step 3: Cross multiply
    30,981.84x = 42,733.32 × 20,368.08
  4. Step 4: Simplify right side
    30,981.84x = 870,395,680.43
  5. Step 5: Solve for x
    x = 870,395,680.43/30,981.84
  6. Step 6: Final answer
    x = 28,093.74

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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.