Home / 30,699.54-42,365.43-18,125.10

Finding the Fourth Proportional to 30,699.54, 42,365.43 and 18,125.10

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Solution

The fourth proportional to 30,699.54, 42,365.43 and 18,125.10 is: 25,012.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,699.54 : 42,365.43 = 18,125.10 : x
  2. Step 2: Convert to fraction form
    30,699.54/42,365.43 = 18,125.10/x
  3. Step 3: Cross multiply
    30,699.54x = 42,365.43 × 18,125.10
  4. Step 4: Simplify right side
    30,699.54x = 767,877,655.29
  5. Step 5: Solve for x
    x = 767,877,655.29/30,699.54
  6. Step 6: Final answer
    x = 25,012.68

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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.