Home / 15,319.49-21,140.08-8,605.40

Finding the Fourth Proportional to 15,319.49, 21,140.08 and 8,605.40

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Solution

The fourth proportional to 15,319.49, 21,140.08 and 8,605.40 is: 11,874.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.49 : 21,140.08 = 8,605.40 : x
  2. Step 2: Convert to fraction form
    15,319.49/21,140.08 = 8,605.40/x
  3. Step 3: Cross multiply
    15,319.49x = 21,140.08 × 8,605.40
  4. Step 4: Simplify right side
    15,319.49x = 181,918,717.22
  5. Step 5: Solve for x
    x = 181,918,717.22/15,319.49
  6. Step 6: Final answer
    x = 11,874.99

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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.