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Finding the Fourth Proportional to 9,987.70, 14,981.55 and 5,322.10

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Solution

The fourth proportional to 9,987.70, 14,981.55 and 5,322.10 is: 7,983.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.70 : 14,981.55 = 5,322.10 : x
  2. Step 2: Convert to fraction form
    9,987.70/14,981.55 = 5,322.10/x
  3. Step 3: Cross multiply
    9,987.70x = 14,981.55 × 5,322.10
  4. Step 4: Simplify right side
    9,987.70x = 79,733,307.26
  5. Step 5: Solve for x
    x = 79,733,307.26/9,987.70
  6. Step 6: Final answer
    x = 7,983.15

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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.