Home / 28,207.84-42,310.08-12,621.28

Finding the Fourth Proportional to 28,207.84, 42,310.08 and 12,621.28

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Solution

The fourth proportional to 28,207.84, 42,310.08 and 12,621.28 is: 18,931.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,207.84 : 42,310.08 = 12,621.28 : x
  2. Step 2: Convert to fraction form
    28,207.84/42,310.08 = 12,621.28/x
  3. Step 3: Cross multiply
    28,207.84x = 42,310.08 × 12,621.28
  4. Step 4: Simplify right side
    28,207.84x = 534,007,366.50
  5. Step 5: Solve for x
    x = 534,007,366.50/28,207.84
  6. Step 6: Final answer
    x = 18,931.17

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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.