Home / 30,828.81-42,543.81-16,681.65

Finding the Fourth Proportional to 30,828.81, 42,543.81 and 16,681.65

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Solution

The fourth proportional to 30,828.81, 42,543.81 and 16,681.65 is: 23,020.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,828.81 : 42,543.81 = 16,681.65 : x
  2. Step 2: Convert to fraction form
    30,828.81/42,543.81 = 16,681.65/x
  3. Step 3: Cross multiply
    30,828.81x = 42,543.81 × 16,681.65
  4. Step 4: Simplify right side
    30,828.81x = 709,700,948.09
  5. Step 5: Solve for x
    x = 709,700,948.09/30,828.81
  6. Step 6: Final answer
    x = 23,020.71

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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.