Home / 30,655.67-42,308.73-18,716.47

Finding the Fourth Proportional to 30,655.67, 42,308.73 and 18,716.47

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Solution

The fourth proportional to 30,655.67, 42,308.73 and 18,716.47 is: 25,831.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,655.67 : 42,308.73 = 18,716.47 : x
  2. Step 2: Convert to fraction form
    30,655.67/42,308.73 = 18,716.47/x
  3. Step 3: Cross multiply
    30,655.67x = 42,308.73 × 18,716.47
  4. Step 4: Simplify right side
    30,655.67x = 791,869,970.01
  5. Step 5: Solve for x
    x = 791,869,970.01/30,655.67
  6. Step 6: Final answer
    x = 25,831.11

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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.