Home / 15,427.95-21,290.14-9,140.33

Finding the Fourth Proportional to 15,427.95, 21,290.14 and 9,140.33

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Solution

The fourth proportional to 15,427.95, 21,290.14 and 9,140.33 is: 12,613.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,427.95 : 21,290.14 = 9,140.33 : x
  2. Step 2: Convert to fraction form
    15,427.95/21,290.14 = 9,140.33/x
  3. Step 3: Cross multiply
    15,427.95x = 21,290.14 × 9,140.33
  4. Step 4: Simplify right side
    15,427.95x = 194,598,798.90
  5. Step 5: Solve for x
    x = 194,598,798.90/15,427.95
  6. Step 6: Final answer
    x = 12,613.39

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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.