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Finding the Fourth Proportional to 30,602.88, 42,223.88 and 18,665.51

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Solution

The fourth proportional to 30,602.88, 42,223.88 and 18,665.51 is: 25,753.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,602.88 : 42,223.88 = 18,665.51 : x
  2. Step 2: Convert to fraction form
    30,602.88/42,223.88 = 18,665.51/x
  3. Step 3: Cross multiply
    30,602.88x = 42,223.88 × 18,665.51
  4. Step 4: Simplify right side
    30,602.88x = 788,130,089.92
  5. Step 5: Solve for x
    x = 788,130,089.92/30,602.88
  6. Step 6: Final answer
    x = 25,753.46

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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.