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Finding the Fourth Proportional to 18,981.01, 28,482.45 and 7,888.06

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Solution

The fourth proportional to 18,981.01, 28,482.45 and 7,888.06 is: 11,836.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.01 : 28,482.45 = 7,888.06 : x
  2. Step 2: Convert to fraction form
    18,981.01/28,482.45 = 7,888.06/x
  3. Step 3: Cross multiply
    18,981.01x = 28,482.45 × 7,888.06
  4. Step 4: Simplify right side
    18,981.01x = 224,671,274.55
  5. Step 5: Solve for x
    x = 224,671,274.55/18,981.01
  6. Step 6: Final answer
    x = 11,836.63

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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.