Home / 13,321.03-19,981.51-12,509.07

Finding the Fourth Proportional to 13,321.03, 19,981.51 and 12,509.07

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Solution

The fourth proportional to 13,321.03, 19,981.51 and 12,509.07 is: 18,763.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.03 : 19,981.51 = 12,509.07 : x
  2. Step 2: Convert to fraction form
    13,321.03/19,981.51 = 12,509.07/x
  3. Step 3: Cross multiply
    13,321.03x = 19,981.51 × 12,509.07
  4. Step 4: Simplify right side
    13,321.03x = 249,950,076.02
  5. Step 5: Solve for x
    x = 249,950,076.02/13,321.03
  6. Step 6: Final answer
    x = 18,763.57

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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.