Home / 30,931.89-42,685.83-16,784.43

Finding the Fourth Proportional to 30,931.89, 42,685.83 and 16,784.43

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Solution

The fourth proportional to 30,931.89, 42,685.83 and 16,784.43 is: 23,162.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,931.89 : 42,685.83 = 16,784.43 : x
  2. Step 2: Convert to fraction form
    30,931.89/42,685.83 = 16,784.43/x
  3. Step 3: Cross multiply
    30,931.89x = 42,685.83 × 16,784.43
  4. Step 4: Simplify right side
    30,931.89x = 716,457,325.63
  5. Step 5: Solve for x
    x = 716,457,325.63/30,931.89
  6. Step 6: Final answer
    x = 23,162.42

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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.