Home / 27,980.20-42,002.70-16,899.40

Finding the Fourth Proportional to 27,980.20, 42,002.70 and 16,899.40

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Solution

The fourth proportional to 27,980.20, 42,002.70 and 16,899.40 is: 25,368.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.20 : 42,002.70 = 16,899.40 : x
  2. Step 2: Convert to fraction form
    27,980.20/42,002.70 = 16,899.40/x
  3. Step 3: Cross multiply
    27,980.20x = 42,002.70 × 16,899.40
  4. Step 4: Simplify right side
    27,980.20x = 709,820,428.38
  5. Step 5: Solve for x
    x = 709,820,428.38/27,980.20
  6. Step 6: Final answer
    x = 25,368.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.