Home / 30,770.52-42,446.28-20,681.16

Finding the Fourth Proportional to 30,770.52, 42,446.28 and 20,681.16

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Solution

The fourth proportional to 30,770.52, 42,446.28 and 20,681.16 is: 28,528.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,770.52 : 42,446.28 = 20,681.16 : x
  2. Step 2: Convert to fraction form
    30,770.52/42,446.28 = 20,681.16/x
  3. Step 3: Cross multiply
    30,770.52x = 42,446.28 × 20,681.16
  4. Step 4: Simplify right side
    30,770.52x = 877,838,308.08
  5. Step 5: Solve for x
    x = 877,838,308.08/30,770.52
  6. Step 6: Final answer
    x = 28,528.55

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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.