Home / 30,867.81-42,597.80-16,720.67

Finding the Fourth Proportional to 30,867.81, 42,597.80 and 16,720.67

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Solution

The fourth proportional to 30,867.81, 42,597.80 and 16,720.67 is: 23,074.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,867.81 : 42,597.80 = 16,720.67 : x
  2. Step 2: Convert to fraction form
    30,867.81/42,597.80 = 16,720.67/x
  3. Step 3: Cross multiply
    30,867.81x = 42,597.80 × 16,720.67
  4. Step 4: Simplify right side
    30,867.81x = 712,263,459.93
  5. Step 5: Solve for x
    x = 712,263,459.93/30,867.81
  6. Step 6: Final answer
    x = 23,074.64

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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.