Home / 15,420.71-21,290.63-9,455.67

Finding the Fourth Proportional to 15,420.71, 21,290.63 and 9,455.67

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Solution

The fourth proportional to 15,420.71, 21,290.63 and 9,455.67 is: 13,054.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.71 : 21,290.63 = 9,455.67 : x
  2. Step 2: Convert to fraction form
    15,420.71/21,290.63 = 9,455.67/x
  3. Step 3: Cross multiply
    15,420.71x = 21,290.63 × 9,455.67
  4. Step 4: Simplify right side
    15,420.71x = 201,317,124.09
  5. Step 5: Solve for x
    x = 201,317,124.09/15,420.71
  6. Step 6: Final answer
    x = 13,054.99

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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.