Home / 30,931.20-42,684.84-16,783.68

Finding the Fourth Proportional to 30,931.20, 42,684.84 and 16,783.68

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Solution

The fourth proportional to 30,931.20, 42,684.84 and 16,783.68 is: 23,161.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,931.20 : 42,684.84 = 16,783.68 : x
  2. Step 2: Convert to fraction form
    30,931.20/42,684.84 = 16,783.68/x
  3. Step 3: Cross multiply
    30,931.20x = 42,684.84 × 16,783.68
  4. Step 4: Simplify right side
    30,931.20x = 716,408,695.41
  5. Step 5: Solve for x
    x = 716,408,695.41/30,931.20
  6. Step 6: Final answer
    x = 23,161.36

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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.