Home / 14,257.60-21,386.40-13,220.80

Finding the Fourth Proportional to 14,257.60, 21,386.40 and 13,220.80

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Solution

The fourth proportional to 14,257.60, 21,386.40 and 13,220.80 is: 19,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,257.60 : 21,386.40 = 13,220.80 : x
  2. Step 2: Convert to fraction form
    14,257.60/21,386.40 = 13,220.80/x
  3. Step 3: Cross multiply
    14,257.60x = 21,386.40 × 13,220.80
  4. Step 4: Simplify right side
    14,257.60x = 282,745,317.12
  5. Step 5: Solve for x
    x = 282,745,317.12/14,257.60
  6. Step 6: Final answer
    x = 19,831.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.