Home / 13,400.99-18,490.63-7,431.40

Finding the Fourth Proportional to 13,400.99, 18,490.63 and 7,431.40

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Solution

The fourth proportional to 13,400.99, 18,490.63 and 7,431.40 is: 10,253.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.99 : 18,490.63 = 7,431.40 : x
  2. Step 2: Convert to fraction form
    13,400.99/18,490.63 = 7,431.40/x
  3. Step 3: Cross multiply
    13,400.99x = 18,490.63 × 7,431.40
  4. Step 4: Simplify right side
    13,400.99x = 137,411,182.24
  5. Step 5: Solve for x
    x = 137,411,182.24/13,400.99
  6. Step 6: Final answer
    x = 10,253.80

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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.