Home / 30,971.07-42,739.17-16,823.88

Finding the Fourth Proportional to 30,971.07, 42,739.17 and 16,823.88

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Solution

The fourth proportional to 30,971.07, 42,739.17 and 16,823.88 is: 23,216.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,971.07 : 42,739.17 = 16,823.88 : x
  2. Step 2: Convert to fraction form
    30,971.07/42,739.17 = 16,823.88/x
  3. Step 3: Cross multiply
    30,971.07x = 42,739.17 × 16,823.88
  4. Step 4: Simplify right side
    30,971.07x = 719,038,667.38
  5. Step 5: Solve for x
    x = 719,038,667.38/30,971.07
  6. Step 6: Final answer
    x = 23,216.46

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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.