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Finding the Fourth Proportional to 14,871.88, 20,547.30 and 12,657.16

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Solution

The fourth proportional to 14,871.88, 20,547.30 and 12,657.16 is: 17,487.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,871.88 : 20,547.30 = 12,657.16 : x
  2. Step 2: Convert to fraction form
    14,871.88/20,547.30 = 12,657.16/x
  3. Step 3: Cross multiply
    14,871.88x = 20,547.30 × 12,657.16
  4. Step 4: Simplify right side
    14,871.88x = 260,070,463.67
  5. Step 5: Solve for x
    x = 260,070,463.67/14,871.88
  6. Step 6: Final answer
    x = 17,487.40

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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.