Home / 19,989.48-30,018.28-19,153.56

Finding the Fourth Proportional to 19,989.48, 30,018.28 and 19,153.56

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Solution

The fourth proportional to 19,989.48, 30,018.28 and 19,153.56 is: 28,762.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.48 : 30,018.28 = 19,153.56 : x
  2. Step 2: Convert to fraction form
    19,989.48/30,018.28 = 19,153.56/x
  3. Step 3: Cross multiply
    19,989.48x = 30,018.28 × 19,153.56
  4. Step 4: Simplify right side
    19,989.48x = 574,956,927.08
  5. Step 5: Solve for x
    x = 574,956,927.08/19,989.48
  6. Step 6: Final answer
    x = 28,762.98

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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.