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Finding the Fourth Proportional to 28,945.80, 43,345.80 and 19,031.40

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Solution

The fourth proportional to 28,945.80, 43,345.80 and 19,031.40 is: 28,499.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,945.80 : 43,345.80 = 19,031.40 : x
  2. Step 2: Convert to fraction form
    28,945.80/43,345.80 = 19,031.40/x
  3. Step 3: Cross multiply
    28,945.80x = 43,345.80 × 19,031.40
  4. Step 4: Simplify right side
    28,945.80x = 824,931,258.12
  5. Step 5: Solve for x
    x = 824,931,258.12/28,945.80
  6. Step 6: Final answer
    x = 28,499.17

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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.