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Finding the Fourth Proportional to 14,643.61, 20,210.55 and 8,981.50

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Solution

The fourth proportional to 14,643.61, 20,210.55 and 8,981.50 is: 12,395.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.61 : 20,210.55 = 8,981.50 : x
  2. Step 2: Convert to fraction form
    14,643.61/20,210.55 = 8,981.50/x
  3. Step 3: Cross multiply
    14,643.61x = 20,210.55 × 8,981.50
  4. Step 4: Simplify right side
    14,643.61x = 181,521,054.83
  5. Step 5: Solve for x
    x = 181,521,054.83/14,643.61
  6. Step 6: Final answer
    x = 12,395.92

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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.