Home / 30,437.52-42,000.66-20,885.60

Finding the Fourth Proportional to 30,437.52, 42,000.66 and 20,885.60

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Solution

The fourth proportional to 30,437.52, 42,000.66 and 20,885.60 is: 28,819.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,437.52 : 42,000.66 = 20,885.60 : x
  2. Step 2: Convert to fraction form
    30,437.52/42,000.66 = 20,885.60/x
  3. Step 3: Cross multiply
    30,437.52x = 42,000.66 × 20,885.60
  4. Step 4: Simplify right side
    30,437.52x = 877,208,774.49
  5. Step 5: Solve for x
    x = 877,208,774.49/30,437.52
  6. Step 6: Final answer
    x = 28,819.98

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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.