Home / 13,398.58-18,490.47-7,430.80

Finding the Fourth Proportional to 13,398.58, 18,490.47 and 7,430.80

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Solution

The fourth proportional to 13,398.58, 18,490.47 and 7,430.80 is: 10,254.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.58 : 18,490.47 = 7,430.80 : x
  2. Step 2: Convert to fraction form
    13,398.58/18,490.47 = 7,430.80/x
  3. Step 3: Cross multiply
    13,398.58x = 18,490.47 × 7,430.80
  4. Step 4: Simplify right side
    13,398.58x = 137,398,984.48
  5. Step 5: Solve for x
    x = 137,398,984.48/13,398.58
  6. Step 6: Final answer
    x = 10,254.74

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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.