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Finding the Fourth Proportional to 30,681.90, 45,998.55 and 16,830.90

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Solution

The fourth proportional to 30,681.90, 45,998.55 and 16,830.90 is: 25,233.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,681.90 : 45,998.55 = 16,830.90 : x
  2. Step 2: Convert to fraction form
    30,681.90/45,998.55 = 16,830.90/x
  3. Step 3: Cross multiply
    30,681.90x = 45,998.55 × 16,830.90
  4. Step 4: Simplify right side
    30,681.90x = 774,196,995.20
  5. Step 5: Solve for x
    x = 774,196,995.20/30,681.90
  6. Step 6: Final answer
    x = 25,233.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.