Home / 30,928.74-42,681.77-16,781.58

Finding the Fourth Proportional to 30,928.74, 42,681.77 and 16,781.58

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Solution

The fourth proportional to 30,928.74, 42,681.77 and 16,781.58 is: 23,158.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.74 : 42,681.77 = 16,781.58 : x
  2. Step 2: Convert to fraction form
    30,928.74/42,681.77 = 16,781.58/x
  3. Step 3: Cross multiply
    30,928.74x = 42,681.77 × 16,781.58
  4. Step 4: Simplify right side
    30,928.74x = 716,267,516.82
  5. Step 5: Solve for x
    x = 716,267,516.82/30,928.74
  6. Step 6: Final answer
    x = 23,158.64

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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.