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Finding the Fourth Proportional to 35,860.81, 53,798.51 and 12,489.07

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Solution

The fourth proportional to 35,860.81, 53,798.51 and 12,489.07 is: 18,736.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,860.81 : 53,798.51 = 12,489.07 : x
  2. Step 2: Convert to fraction form
    35,860.81/53,798.51 = 12,489.07/x
  3. Step 3: Cross multiply
    35,860.81x = 53,798.51 × 12,489.07
  4. Step 4: Simplify right side
    35,860.81x = 671,893,357.29
  5. Step 5: Solve for x
    x = 671,893,357.29/35,860.81
  6. Step 6: Final answer
    x = 18,736.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.