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Finding the Fourth Proportional to 12,312.90, 17,281.80 and 12,312.90

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Solution

The fourth proportional to 12,312.90, 17,281.80 and 12,312.90 is: 17,281.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.90 : 17,281.80 = 12,312.90 : x
  2. Step 2: Convert to fraction form
    12,312.90/17,281.80 = 12,312.90/x
  3. Step 3: Cross multiply
    12,312.90x = 17,281.80 × 12,312.90
  4. Step 4: Simplify right side
    12,312.90x = 212,789,075.22
  5. Step 5: Solve for x
    x = 212,789,075.22/12,312.90
  6. Step 6: Final answer
    x = 17,281.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.