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Finding the Fourth Proportional to 30,748.48, 42,434.48 and 18,808.08

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Solution

The fourth proportional to 30,748.48, 42,434.48 and 18,808.08 is: 25,956.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,748.48 : 42,434.48 = 18,808.08 : x
  2. Step 2: Convert to fraction form
    30,748.48/42,434.48 = 18,808.08/x
  3. Step 3: Cross multiply
    30,748.48x = 42,434.48 × 18,808.08
  4. Step 4: Simplify right side
    30,748.48x = 798,111,094.60
  5. Step 5: Solve for x
    x = 798,111,094.60/30,748.48
  6. Step 6: Final answer
    x = 25,956.12

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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.