Home / 15,666.18-21,617.76-9,695.67

Finding the Fourth Proportional to 15,666.18, 21,617.76 and 9,695.67

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Solution

The fourth proportional to 15,666.18, 21,617.76 and 9,695.67 is: 13,379.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.18 : 21,617.76 = 9,695.67 : x
  2. Step 2: Convert to fraction form
    15,666.18/21,617.76 = 9,695.67/x
  3. Step 3: Cross multiply
    15,666.18x = 21,617.76 × 9,695.67
  4. Step 4: Simplify right side
    15,666.18x = 209,598,667.10
  5. Step 5: Solve for x
    x = 209,598,667.10/15,666.18
  6. Step 6: Final answer
    x = 13,379.05

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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.