Home / 51,341.35-70,821.50-30,909.21

Finding the Fourth Proportional to 51,341.35, 70,821.50 and 30,909.21

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Solution

The fourth proportional to 51,341.35, 70,821.50 and 30,909.21 is: 42,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,341.35 : 70,821.50 = 30,909.21 : x
  2. Step 2: Convert to fraction form
    51,341.35/70,821.50 = 30,909.21/x
  3. Step 3: Cross multiply
    51,341.35x = 70,821.50 × 30,909.21
  4. Step 4: Simplify right side
    51,341.35x = 2,189,036,184.63
  5. Step 5: Solve for x
    x = 2,189,036,184.63/51,341.35
  6. Step 6: Final answer
    x = 42,636.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.