Home / 30,828.96-42,543.95-16,681.79

Finding the Fourth Proportional to 30,828.96, 42,543.95 and 16,681.79

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Solution

The fourth proportional to 30,828.96, 42,543.95 and 16,681.79 is: 23,020.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,828.96 : 42,543.95 = 16,681.79 : x
  2. Step 2: Convert to fraction form
    30,828.96/42,543.95 = 16,681.79/x
  3. Step 3: Cross multiply
    30,828.96x = 42,543.95 × 16,681.79
  4. Step 4: Simplify right side
    30,828.96x = 709,708,943.54
  5. Step 5: Solve for x
    x = 709,708,943.54/30,828.96
  6. Step 6: Final answer
    x = 23,020.85

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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.