Home / 30,987.21-42,762.44-16,840.11

Finding the Fourth Proportional to 30,987.21, 42,762.44 and 16,840.11

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Solution

The fourth proportional to 30,987.21, 42,762.44 and 16,840.11 is: 23,239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.21 : 42,762.44 = 16,840.11 : x
  2. Step 2: Convert to fraction form
    30,987.21/42,762.44 = 16,840.11/x
  3. Step 3: Cross multiply
    30,987.21x = 42,762.44 × 16,840.11
  4. Step 4: Simplify right side
    30,987.21x = 720,124,109.27
  5. Step 5: Solve for x
    x = 720,124,109.27/30,987.21
  6. Step 6: Final answer
    x = 23,239.40

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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.