Home / 30,667.55-42,396.69-30,386.89

Finding the Fourth Proportional to 30,667.55, 42,396.69 and 30,386.89

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Solution

The fourth proportional to 30,667.55, 42,396.69 and 30,386.89 is: 42,008.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,667.55 : 42,396.69 = 30,386.89 : x
  2. Step 2: Convert to fraction form
    30,667.55/42,396.69 = 30,386.89/x
  3. Step 3: Cross multiply
    30,667.55x = 42,396.69 × 30,386.89
  4. Step 4: Simplify right side
    30,667.55x = 1,288,303,343.41
  5. Step 5: Solve for x
    x = 1,288,303,343.41/30,667.55
  6. Step 6: Final answer
    x = 42,008.68

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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.