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Finding the Fourth Proportional to 30,207.70, 45,311.55 and 19,710.10

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Solution

The fourth proportional to 30,207.70, 45,311.55 and 19,710.10 is: 29,565.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,207.70 : 45,311.55 = 19,710.10 : x
  2. Step 2: Convert to fraction form
    30,207.70/45,311.55 = 19,710.10/x
  3. Step 3: Cross multiply
    30,207.70x = 45,311.55 × 19,710.10
  4. Step 4: Simplify right side
    30,207.70x = 893,095,181.66
  5. Step 5: Solve for x
    x = 893,095,181.66/30,207.70
  6. Step 6: Final answer
    x = 29,565.15

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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.