Home / 30,387.90-41,948.10-18,455.08

Finding the Fourth Proportional to 30,387.90, 41,948.10 and 18,455.08

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Solution

The fourth proportional to 30,387.90, 41,948.10 and 18,455.08 is: 25,475.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.90 : 41,948.10 = 18,455.08 : x
  2. Step 2: Convert to fraction form
    30,387.90/41,948.10 = 18,455.08/x
  3. Step 3: Cross multiply
    30,387.90x = 41,948.10 × 18,455.08
  4. Step 4: Simplify right side
    30,387.90x = 774,155,541.35
  5. Step 5: Solve for x
    x = 774,155,541.35/30,387.90
  6. Step 6: Final answer
    x = 25,475.78

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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.