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Finding the Fourth Proportional to 19,813.60, 29,720.40 and 18,501.40

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Solution

The fourth proportional to 19,813.60, 29,720.40 and 18,501.40 is: 27,752.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,813.60 : 29,720.40 = 18,501.40 : x
  2. Step 2: Convert to fraction form
    19,813.60/29,720.40 = 18,501.40/x
  3. Step 3: Cross multiply
    19,813.60x = 29,720.40 × 18,501.40
  4. Step 4: Simplify right side
    19,813.60x = 549,869,008.56
  5. Step 5: Solve for x
    x = 549,869,008.56/19,813.60
  6. Step 6: Final answer
    x = 27,752.10

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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.