Home / 30,840.24-42,550.12-18,899.20

Finding the Fourth Proportional to 30,840.24, 42,550.12 and 18,899.20

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Solution

The fourth proportional to 30,840.24, 42,550.12 and 18,899.20 is: 26,075.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.24 : 42,550.12 = 18,899.20 : x
  2. Step 2: Convert to fraction form
    30,840.24/42,550.12 = 18,899.20/x
  3. Step 3: Cross multiply
    30,840.24x = 42,550.12 × 18,899.20
  4. Step 4: Simplify right side
    30,840.24x = 804,163,227.90
  5. Step 5: Solve for x
    x = 804,163,227.90/30,840.24
  6. Step 6: Final answer
    x = 26,075.13

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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.