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Finding the Fourth Proportional to 9,990.59, 14,985.87 and 2,970.57

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Solution

The fourth proportional to 9,990.59, 14,985.87 and 2,970.57 is: 4,455.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.59 : 14,985.87 = 2,970.57 : x
  2. Step 2: Convert to fraction form
    9,990.59/14,985.87 = 2,970.57/x
  3. Step 3: Cross multiply
    9,990.59x = 14,985.87 × 2,970.57
  4. Step 4: Simplify right side
    9,990.59x = 44,516,536.61
  5. Step 5: Solve for x
    x = 44,516,536.61/9,990.59
  6. Step 6: Final answer
    x = 4,455.85

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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.