Home / 30,690.90-42,352.74-18,754.20

Finding the Fourth Proportional to 30,690.90, 42,352.74 and 18,754.20

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Solution

The fourth proportional to 30,690.90, 42,352.74 and 18,754.20 is: 25,880.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.90 : 42,352.74 = 18,754.20 : x
  2. Step 2: Convert to fraction form
    30,690.90/42,352.74 = 18,754.20/x
  3. Step 3: Cross multiply
    30,690.90x = 42,352.74 × 18,754.20
  4. Step 4: Simplify right side
    30,690.90x = 794,291,756.51
  5. Step 5: Solve for x
    x = 794,291,756.51/30,690.90
  6. Step 6: Final answer
    x = 25,880.37

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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.