Finding the Fourth Proportional to 21,119,988.06, 29,145,809.07 and 12,971,226.06
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Solution
The fourth proportional to 21,119,988.06, 29,145,809.07 and 12,971,226.06 is: 17,900,430.49
Step by Step Solution
- Step 1: Write the proportion equation
21,119,988.06 : 29,145,809.07 = 12,971,226.06 : x - Step 2: Convert to fraction form
21,119,988.06/29,145,809.07 = 12,971,226.06/x - Step 3: Cross multiply
21,119,988.06x = 29,145,809.07 × 12,971,226.06 - Step 4: Simplify right side
21,119,988.06x = 378,056,878,148,568.38 - Step 5: Solve for x
x = 378,056,878,148,568.38/21,119,988.06 - Step 6: Final answer
x = 17,900,430.49
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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.