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Finding the Fourth Proportional to 30,696.70, 46,045.05 and 9,920.20

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Solution

The fourth proportional to 30,696.70, 46,045.05 and 9,920.20 is: 14,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,696.70 : 46,045.05 = 9,920.20 : x
  2. Step 2: Convert to fraction form
    30,696.70/46,045.05 = 9,920.20/x
  3. Step 3: Cross multiply
    30,696.70x = 46,045.05 × 9,920.20
  4. Step 4: Simplify right side
    30,696.70x = 456,776,105.01
  5. Step 5: Solve for x
    x = 456,776,105.01/30,696.70
  6. Step 6: Final answer
    x = 14,880.30

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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.