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Finding the Fourth Proportional to 15,802.80, 21,810.48 and 12,038.40

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Solution

The fourth proportional to 15,802.80, 21,810.48 and 12,038.40 is: 16,614.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,802.80 : 21,810.48 = 12,038.40 : x
  2. Step 2: Convert to fraction form
    15,802.80/21,810.48 = 12,038.40/x
  3. Step 3: Cross multiply
    15,802.80x = 21,810.48 × 12,038.40
  4. Step 4: Simplify right side
    15,802.80x = 262,563,282.43
  5. Step 5: Solve for x
    x = 262,563,282.43/15,802.80
  6. Step 6: Final answer
    x = 16,614.98

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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.