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Finding the Fourth Proportional to 19,279.20, 28,918.80 and 14,030.40

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Solution

The fourth proportional to 19,279.20, 28,918.80 and 14,030.40 is: 21,045.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,279.20 : 28,918.80 = 14,030.40 : x
  2. Step 2: Convert to fraction form
    19,279.20/28,918.80 = 14,030.40/x
  3. Step 3: Cross multiply
    19,279.20x = 28,918.80 × 14,030.40
  4. Step 4: Simplify right side
    19,279.20x = 405,742,331.52
  5. Step 5: Solve for x
    x = 405,742,331.52/19,279.20
  6. Step 6: Final answer
    x = 21,045.60

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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.