Home / 13,290.78-18,343.56-9,038.99

Finding the Fourth Proportional to 13,290.78, 18,343.56 and 9,038.99

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Solution

The fourth proportional to 13,290.78, 18,343.56 and 9,038.99 is: 12,475.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.78 : 18,343.56 = 9,038.99 : x
  2. Step 2: Convert to fraction form
    13,290.78/18,343.56 = 9,038.99/x
  3. Step 3: Cross multiply
    13,290.78x = 18,343.56 × 9,038.99
  4. Step 4: Simplify right side
    13,290.78x = 165,807,335.16
  5. Step 5: Solve for x
    x = 165,807,335.16/13,290.78
  6. Step 6: Final answer
    x = 12,475.36

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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.