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Finding the Fourth Proportional to 30,957.90, 42,719.63 and 17,530.67

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Solution

The fourth proportional to 30,957.90, 42,719.63 and 17,530.67 is: 24,191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,957.90 : 42,719.63 = 17,530.67 : x
  2. Step 2: Convert to fraction form
    30,957.90/42,719.63 = 17,530.67/x
  3. Step 3: Cross multiply
    30,957.90x = 42,719.63 × 17,530.67
  4. Step 4: Simplify right side
    30,957.90x = 748,903,434.80
  5. Step 5: Solve for x
    x = 748,903,434.80/30,957.90
  6. Step 6: Final answer
    x = 24,191.03

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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.