Home / 15,495.50-21,440.10-13,510.20

Finding the Fourth Proportional to 15,495.50, 21,440.10 and 13,510.20

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Solution

The fourth proportional to 15,495.50, 21,440.10 and 13,510.20 is: 18,693.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.50 : 21,440.10 = 13,510.20 : x
  2. Step 2: Convert to fraction form
    15,495.50/21,440.10 = 13,510.20/x
  3. Step 3: Cross multiply
    15,495.50x = 21,440.10 × 13,510.20
  4. Step 4: Simplify right side
    15,495.50x = 289,660,039.02
  5. Step 5: Solve for x
    x = 289,660,039.02/15,495.50
  6. Step 6: Final answer
    x = 18,693.17

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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.