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Finding the Fourth Proportional to 14,395.40, 19,864.98 and 9,678.92

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Solution

The fourth proportional to 14,395.40, 19,864.98 and 9,678.92 is: 13,356.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,395.40 : 19,864.98 = 9,678.92 : x
  2. Step 2: Convert to fraction form
    14,395.40/19,864.98 = 9,678.92/x
  3. Step 3: Cross multiply
    14,395.40x = 19,864.98 × 9,678.92
  4. Step 4: Simplify right side
    14,395.40x = 192,271,552.22
  5. Step 5: Solve for x
    x = 192,271,552.22/14,395.40
  6. Step 6: Final answer
    x = 13,356.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.