Home / 19,990.16-30,003.80-10,136.40

Finding the Fourth Proportional to 19,990.16, 30,003.80 and 10,136.40

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Solution

The fourth proportional to 19,990.16, 30,003.80 and 10,136.40 is: 15,214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.16 : 30,003.80 = 10,136.40 : x
  2. Step 2: Convert to fraction form
    19,990.16/30,003.80 = 10,136.40/x
  3. Step 3: Cross multiply
    19,990.16x = 30,003.80 × 10,136.40
  4. Step 4: Simplify right side
    19,990.16x = 304,130,518.32
  5. Step 5: Solve for x
    x = 304,130,518.32/19,990.16
  6. Step 6: Final answer
    x = 15,214.01

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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.