Home / 30,913.48-42,618.18-20,700.52

Finding the Fourth Proportional to 30,913.48, 42,618.18 and 20,700.52

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Solution

The fourth proportional to 30,913.48, 42,618.18 and 20,700.52 is: 28,538.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,913.48 : 42,618.18 = 20,700.52 : x
  2. Step 2: Convert to fraction form
    30,913.48/42,618.18 = 20,700.52/x
  3. Step 3: Cross multiply
    30,913.48x = 42,618.18 × 20,700.52
  4. Step 4: Simplify right side
    30,913.48x = 882,218,487.45
  5. Step 5: Solve for x
    x = 882,218,487.45/30,913.48
  6. Step 6: Final answer
    x = 28,538.31

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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.