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Finding the Fourth Proportional to 30,118.70, 45,116.69 and 14,275.70

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Solution

The fourth proportional to 30,118.70, 45,116.69 and 14,275.70 is: 21,384.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,118.70 : 45,116.69 = 14,275.70 : x
  2. Step 2: Convert to fraction form
    30,118.70/45,116.69 = 14,275.70/x
  3. Step 3: Cross multiply
    30,118.70x = 45,116.69 × 14,275.70
  4. Step 4: Simplify right side
    30,118.70x = 644,072,372.85
  5. Step 5: Solve for x
    x = 644,072,372.85/30,118.70
  6. Step 6: Final answer
    x = 21,384.47

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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.